The Ultimate Australian Bikini Size & Fit Guide (AU ↔ EU): find your perfect Quelton set
· 4 min read
Struggling to pick the right size online? You’re not alone. A perfect fit means less adjusting on Bondi Beach, more confidence at Byron Bay, and all-day comfort on the Gold Coast. Use this Australian bikini size & fit guide to convert AU ↔ EU, choose your best silhouette, and nail that made-for-you feel.
Quick-size cheat sheet (AU ↔ EU)
Tops (bust focus)
AU 6 = EU 34
AU 8 = EU 36
AU 10 = EU 38
AU 12 = EU 40
AU 14 = EU 42
Bottoms (hip focus)
AU 6 = EU XS
AU 8 = EU S
AU 10 = EU M
AU 12 = EU L
AU 14 = EU XL
Tip: If you’re between sizes, pick the one that keeps fabric smooth, not overstretched—especially with metallics.
How to measure (fast & accurate at home)
Bust: wrap a soft tape around the fullest part of your bust, parallel to the floor.
Underbust: tape snug right under the bust—this guides band support.
Waist: narrowest part of your torso (usually above the belly button).
Hips: fullest part of your hips/bum.
Fit rule of thumb: tops are about bust + underbust, bottoms about hips. Don’t force your “high-street” size—swimwear is more technical.
Choose your silhouette (our 4 fits)
Triangle Bikini — minimal, adjustable, iconic
Best for: tanning days, flexible coverage, smaller to medium busts.
Fit feel: tie-back/tie-neck for custom tension (great if you’re between sizes).
Looks on: effortless, breezy, the classic bikini Australia vibe.
Style it: linen pareo + slides for Byron Bay sunsets.
Pick Triangle if you love adjustability or your bust fluctuates (cycle, training, travel).
Balconette Bikini — shape, lift, and structure
Best for: medium to fuller busts or anyone wanting a defined lift.
Fit feel: supportive band + sculpted cups; stays put through arvo drinks and beach clubs.
Looks on: polished, a little glam—works as a crop top post-beach.
Style it: high-waist trousers + open shirt for Bondi nights.
Pick Balconette if you want more support without losing that refined, premium look.
Sporty Bikini — active, comfy, flattering
Best for: paddle, beach volley, boat days, long swims.
Fit feel: secure straps, confident band compression; zero fuss.
Looks on: clean, athletic, still elevated.
Style it: technical shorts or a breezy sarong on the Gold Coast.
Pick Sporty if you move a lot and want hold + streamlined lines.
Best for: elegant minimalists, beach clubs, seaside dinners.
Fit feel: smooth silhouette with internal grip/support (no slipping).
Looks on: body-contouring, timeless, no tan lines on shoulders.
Style it: wear as a body with blazer + sandals.
Pick Strapless if you want a one-and-done piece that doubles as eveningwear.
AU fit FAQs (real talk)
Q: I’m AU 8–10 depending on brand. Which way should I go? A: Start with EU 36 (AU 8) for Triangle and adjust ties; for Balconette/Sporty, pick the size that keeps the band snug without digging. If your hips are closer to AU 10, choose EU M for bottoms.
Q: Bigger bust, smaller band—what works? A: Balconette for engineered lift, or Triangle with wider tie placement for custom support. Ensure underbust is snug; straps fine-tune lift.
Q: Fuller hips—will a mid or high leg cut flatter? A: A slightly higher leg visually lengthens the leg line. Our bottoms are cut to smooth without squeeze—fabric should lie flat.
Q: Will metallic fabrics stretch the same? A: Yes, but they look best smooth. If you’re between sizes, size up for bottoms; for tops, adjust Triangle ties or choose Balconette’s structured hold.
Q: Can I mix sizes (top/bottom)? A: Absolutely—most Aussie girls do. Choose top by bust/underbust, bottom by hip.
Common fit mistakes (and the quick fix)
Chasing your high-street size Fix: trust the tape and our AU ↔ EU table. Swim fit ≠ jeans fit.
Going too tight for “support” Fix: support comes from pattern + band placement, not painful squeeze.
Ignoring fabric care Fix: rinse after salt/chlorine, shade-dry flat, avoid rough pool edges.
Sun-safe & set-safe (Aussie rules)
SPF 50+ and reapply; pack a UPF rashie for peak UV hours.
Rinse in cool water after sea or pool; never wring; no tumble.
Use a towel buffer on concrete/tiles to protect sheen and elasticity.
Store dry, out of direct sun—to keep colour and fit for 3+ seasons.
Why Quelton fits hit different
Perfect-fit patterns tested on real bodies.
Premium, durable fabrics built to last 3+ seasons in high UV.
Handmade in Spain & Portugal: craftsmanship over mass production.
Design first, never basic: pieces that help you stand out—your way.
Your next step (quick checklist)
Measure bust, underbust, hips.
Convert with the AU ↔ EU table.
Pick your silhouette: Triangle, Balconette, Sporty, or Strapless one-piece.
Keep fabric smooth; mix sizes if needed.
Add to cart, and get ready for an Aussie summer without fidgeting.
Shop swimwear Australia: Triangle, Balconette, Sporty bikinis and Strapless one-pieces—handmade by Quelton, crafted to flatter and built to last. https://queltonshop.com
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Find your size
Choose how you want to find your perfect size.
Same bikini, four bodies: who do you look most like?
Bust
70 cm115 cm
Waist
55 cm100 cm
Hips
80 cm120 cm
Size references
MaríaXSSuj. 65/70 · Vaq. 32/34
JimenaSSuj. 85/90 · Vaq. 36
CarlotaMSuj. 90/95 · Vaq. 38
BlancaLSuj. 95/100 · Vaq. 40
Top—
Bottom—
Size guide (cm)
Size
Bust
Waist
Hips
Key rules
Your bust sets the top size · your hips set the bottom size
Between two sizes, always go for the larger one
Top and bottom can be ordered in different sizes
Metallic fabrics have less stretch: if in doubt, size up
Reyes · QueltonInstant answers
Shall we play? 💅 Take my **quick test** and I'll tell you **your perfect bikini**: the one that best suits your skin, hair, figure and style.
I get it, choosing a size online is a bit scary! 🙈 But it's easy: you pick the **top and bottom separately**, from XS to L. If you're between two, **go for the bigger one**. To get it right, take the **«What's my size?»** test: under a minute and **no measuring**.
Good question! We try to keep our sizes **like the big fashion brands**, so you'll usually wear **your usual size**. If you're between two, **go for the bigger one**.
Oh, I'm so sorry! 💗 For now our sizes go **from XS to L**: we don't have XXS or XL. If you're unsure of yours, take the test and I'll tell you **which fits you best**.
Let me tell you! Almost all our tops tie **at the neck and at the back**, so you adjust them to your body. Right now, the ones with **ties to adjust** are the **Revolve, Sheriff, Howdy and Wild West**; in other designs the bottom has an **adjuster** for a perfect fit. And all tops come with **cups (not padded)**, with an opening to remove them or add padding.
I totally get it, finding a bikini with good support is a real challenge! I'd go for the **sporty** or **triangle** tops, which **give great support**, and since almost all of them tie at the neck and back, you can make them **fit you perfectly**.
Don't worry! The **thong bottom isn't tiny**. And the **basic one is Brazilian style**: slightly cheeky but not too much, **just enough to flatter** 😉 If it's a tie-side, you can also adjust it at the sides.
I love that you asked! 💗 All our bikinis are **handmade**, most of them **in Portugal**. We source **the best fabrics in Europe**, mostly with **recycled fibres**, and every year we review our patterns **millimetre by millimetre**.
Not at all! 🙌 **None of our bikinis are see-through**: they're all **lined** and come with **cups**, so nothing shows, not even wet or in light colours. If you don't like the cups you can remove them, and there's a pocket for padding.
Good question! It depends a lot on **how you care for it**. We use **the best fabrics in Europe** and test them for months, but it's normal for the metallic finish to lose some shine over the summers. To make it last: **hand wash it** (never in the machine), **don't dry it in the sun** or the dryer, and in winter store it **completely dry in its fabric bag**.
I love that you want to look after it! 💗 This way it'll last **many summers**:
🫧Always hand wash it inside out, in cold water with a little soap only on stained areas. Never in the washing machine.
🚫No bleach, fabric softener or stain removers, and never in the dryer.
🌤️Dry it inside out, in the shade and without pegs, with the elastics relaxed so they don't stretch.
👜In winter, store it completely dry in its fabric bag (included with every order).
Not at all! **They don't stretch out** 🙌 Just dry them **without pegs** and with the elastics relaxed, and they'll last you **many summers**.
Yes! **All our bikinis are lined** 🤍
**Free shipping** to mainland Spain and the Balearic Islands with MRW 🚚 Order **before 2 pm** (Mon–Fri) and it ships **the same day**. **Mainland**: **24–48 working hours**; **Balearic Islands**: **3–5 working days**. We email you the **tracking number**.
Heads up: **we don't deliver at weekends**. If you need it on a Saturday or Sunday, email us **before ordering** at pedidos@queltonshop.com and we'll tell you the extra cost (in that case shipping isn't free).
**We ship worldwide** 🌍, although outside mainland Spain and the Balearic Islands shipping isn't always free. The **Canary Islands, Ceuta, Melilla and Andorra** have an **extra cost** because of customs. If you're there and can't place your order, email us at pedidos@queltonshop.com and **we'll help you** 💌
Of course! At checkout you can choose to **collect it at a pickup point** 📦
Don't worry, it happens to all of us! 😅 We'd rather you didn't, but if you need to **change the address or cancel**, email us **asap** at pedidos@queltonshop.com with your **order number, name and new address**. We'll reply as fast as we can with the options available.
Oh, I'm so sorry! 😔 Don't worry, **we'll sort it out**. Email us at pedidos@queltonshop.com with your **order number**, your **address** and a **photo** of the faulty bikini (or of the one you received, if it's not what you ordered).
Of course you can't wait! 😍 When your order ships we email you the **MRW tracking number**. To see where it is, go to the MRW website and enter it in the **«No abonados»** box. If you have an account, you'll also see it under **your orders**.
Of course! You have **14 calendar days** to let us know at pedidos@queltonshop.com and send the parcel to our warehouse. Return shipping **is on you**: we recommend **tracked registered post** (or any carrier you like, but **with tracking**, as we can't take responsibility if it gets lost). The bikini must arrive **in perfect condition**, with its **hygiene stickers** and in its **original packaging** (or a similar one). Rather we collect it? We'll send a courier and **deduct the pickup from your refund**.
Super easy! Your **first exchange is free**, whether **size** or **style** 🙌 Email us at pedidos@queltonshop.com with your **order number** and what you'd like instead, and **we'll send a courier to your home** to collect it. Just have it ready: the bikini **in its wrapping, with its hygiene stickers** and in the **bag it came in** (or a similar one).
As soon as the bikini reaches our warehouse, we check it (**perfect condition**, **hygiene stickers** and packaging) and issue **your refund**, which usually takes **1–2 working days** 💸 Any questions, email us at pedidos@queltonshop.com.
Of course! Just like any other bikini: you have **14 calendar days** to exchange or return it, in its original packaging with the hygiene sticker intact. The only exception is if its product page **expressly says no returns**.
Of course! You can pay in **3 interest-free instalments with Klarna** 💳 You can also pay with **Bizum**, but for the **full amount**: instalments are only with Klarna. And of course by card, Apple Pay or PayPal.
Here's a secret! 🤫 We give you a **discount on your first order**: just join our **newsletter**, from the welcome pop-up or at the bottom of the site 💌 And for **promotions** like Black Friday, Christmas or sales, follow us on **Instagram and TikTok**: we announce everything there first 👀
Yes! 🎁 With the **Quelton gift card** you choose the amount and she chooses **the bikini of her dreams**. Perfect for birthdays, anniversaries, Secret Santa or a just-because gift.
Love that you're keeping an eye out! 👀 We usually launch **one collection in March and another in April** 🌸 To be **the first to know**, follow us on **Instagram and TikTok** or join the **newsletter**: we always announce new collections there.
Oh, what a shame! 😔 We usually **don't restock**: when a bikini sells out, **it's gone**. That's how we keep things **exclusive** and you **unique**. What I do recommend is joining the **waiting list**: if we ever restock, **you'll be the first** to know.
Right now **we don't make made-to-measure** or personalised bikinis. But since you **choose the top and bottom separately** and almost all **tie to adjust**, it'll fit **almost made-to-measure**! 😉
Can't wait for you to see them in person! 😍 We don't have our own shop, but you can find us at **several stockists** 🛍️ Which **city** would you like to see them in? Type it and I'll tell you the nearest ones.
Love that you want to be featured! 📸 To appear in **#IconicQueltons** or on our website, **tag us** in your photos, posts or stories: **every Friday** we share the photos of those who tag us on Instagram.
How exciting that you'd like to stock our brand! 💗 We carefully select **the very best stockists**. If you're a **multi-brand store**, our dedicated page has more information and you can **request a quote and purchase terms**.
I love that you asked! 😍 **Quelton** comes from our surname: we tried a thousand combinations until we found it, and the moment we read it, **we fell in love**.
We started in **2020** as a hobby, and in **2025** we left everything to follow our dream: making bikinis that fit well 💗 **Thanks to you** we're here today.
We call it **iconic**! 👑 It's the pattern we started with, which is why it's so special. We bring it back **every year** with new metallics, lurex and **prints we design ourselves from scratch**. Want to see all our iconic bikinis?
The **Bronze**! 🍫 It's a chocolate shade that **goes with everything** and **never goes out of style**: a staple you should have in your wardrobe. Just know **it always sells out**…
Yes! 🤩 Over the years we've worked with **Carlota Marañón, Lola Lolita, Aitana Soriano and Elena Gortari**, and even the stylist of **Aitana, the singer**, got in touch to style our bikinis for her music videos and trips! It's all on our **Wall of Fame**, along with the press we've been featured in.
We make **around 100 units of each design**, and almost all **sell out at launch** 🔥 So if you fall for one, **don't leave it for tomorrow**.
With your order we give you a **premium fabric bag** 👜 to keep your bikinis in a drawer over winter… or to carry your spare bikini or anything else to the beach.
Yes! **It dries super fast** ☀️ So you go from the water to your towel, and from your towel to the beach bar, without staying wet for hours.
It depends what you're after! 😉 If your **legs are on the shorter side** and you want them to **look longer**, go for the **thong bottom**: it really lengthens the leg. If you prefer a bit more coverage, the **basic** is **Brazilian style**: slightly cheeky, **just enough to flatter**.
Great idea, the tan matters too! ☀️ I'd go for a **triangle top** with a **thong bottom**: it leaves the **fewest tan lines** and a **gorgeous tan**.
Love that you're so active! 🏐 For **padel, surfing or beach volleyball** I'd go for the **sporty**, for the **support of the top**. Any **iconic triangle** with its **tie-free** bottom also works great, it doesn't move at all.
Don't worry! **They all stay in place** 🙌 You can dive in and jump the waves **without a care**.
What a plan! 🥂 **Any of them works**: the best part is **each of you wearing your own**, with your own colour and style… and all of you looking **iconic**! 👑
Yes! 💗 And since almost all **tie to adjust** and you **choose the top and bottom separately**, you can adapt them to your body at every stage.
Of course! You can **mix them however you like** 😍 That said, right now we don't have the same colour across different designs for a perfect match, so I'd recommend **buying the full set**: it's designed so **everything matches**.
That's exactly why we do it this way! 😉 You can choose **one size for the top and another for the bottom**, so it fits **your body perfectly**. If you're unsure, take the **«What's my size?»** test and I'll tell you both.
We generally **don't do reservations or pre-orders**, unless we launch a **special offer**. To be the first to hear about launches, join the **newsletter** or follow us on **Instagram and TikTok** 💌
Of course! 😊 You can order **two sizes**, try them on at home and **return the one that doesn't fit** (within **14 calendar days**, with the hygiene sticker intact).
We **don't offer gift wrapping or notes** right now, but if you need it, email me at pedidos@queltonshop.com and we'll see how we can help 🎁
**You don't need an account** to buy 🙌 But if you create one, you **keep all your orders** and it's **much easier to exchange or return**.
We **don't run giveaways** right now 🙈 But if you join our **newsletter**, you get a **discount on your first order** 💌
We **don't have an ambassador, points or refer-a-friend programme** right now 🙈 But if you wear Quelton, **tag us**: you could appear in **#IconicQueltons**!
Haha 😏 The best way to make your ex **regret it**: a Quelton, a sunset and some beach stories. Nothing else needs to be said 🔥
**Ibiza and Formentera** are our favourite places in the world! 🌴 For those coves I'd go for a **metallic**: it shines beautifully in that sun, and in photos… I won't even tell you ✨
**Beach club** plans! 🥂 Stylist's trick: a **metallic or lurex** bikini with a **skirt or shorts** on top… and from the towel to the party **without going home** 💃
I **totally** get it 💗 My sister and I felt exactly the same: we couldn't find a bikini that fitted us well… **that's why we created Quelton**. Patterns fine-tuned **millimetre by millimetre**, top and bottom **in your size** and fabrics that **flatter your figure**. You'll feel **confident and stunning**, I promise.
Hi gorgeous! 👋 How can I help? Type anything or pick below 👇
Thank you! 💗 Anything else, I'm right here. **No basic. Stay Iconic. Be Quelton** 👑
If the **second** bikini doesn't work for you either or you want to return it, that shipment **is on you**: send it to our warehouse yourself. We recommend **tracked registered post** (if the parcel gets lost, we can't take responsibility). Rather we collect it? Email us at pedidos@queltonshop.com with your **order number and address**: we'll arrange the pickup and **deduct that shipping from your refund**.
Not at all! 🙌 Our **lurex doesn't itch**: it's made to feel **soft and pleasant** on your skin.
Sorry, we're **not doing any more collaborations** right now 🙈 But if you wear Quelton, **tag us** in your photos or stories: **every Friday** we share our **#IconicQueltons** 💗
Need a tape measure? 📏 Here's a **PDF**: download it, **print it** on A4 at actual size and **join the strips** if you don't have one at home. Under the centimetres you'll see your size in colour! 😉
Not at all! 🙌 **They don't fade or stain**. We visit **fabric fairs across Europe** to work with **the best suppliers**, and we **test them for months** so they keep their colour.
Your data is **safe** 🔒 We only use it to **process your order** and, if you sign up, to send you the **newsletter**. It's all in our **privacy and cookie policy**.
Of course! At the bottom of **any of our emails** there's an **«Unsubscribe»** link 💌 Or email us at pedidos@queltonshop.com and we'll do it for you.
Of course! It's **your right** 💗 Email us at pedidos@queltonshop.com and we'll **delete your data** or your account.
What you type here **isn't sent anywhere**, unless you fill in a form (your question, the waiting list or the newsletter) 🔒 The only thing stored, **only in your browser**, is your size and the bikinis you've viewed.
We won't spam you! 💌 We write when there's **real news**: in peak summer season, about **2–3 emails a week**, and **much less** the rest of the year. You can unsubscribe anytime.
Yes, and it's one of your favourite things! 🙌 In full bikinis you pick **one size for the top and another for the bottom**, and we also sell **tops and bottoms separately**, so you can mix sizes or colours.
Write to me and I'll reply by email as soon as I can.
It's going to look amazing on you!Great choice. If you have any questions, just ask me.
