Find your perfect fit
One Piece Swimsuit Size Guide
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Measure yourself, not a garment you own. The one-piece swimsuit runs true to size — if you're between sizes, we recommend sizing up.
1
Measure Yourself
Chest / Bust
Tap to see how
Waist
Tap to see how
Hips
Tap to see how
Chest / Bust — Wrap the tape around the fullest part of your chest, keeping it parallel to the floor. Bring the tape under your armpits and across your shoulder blades. Don't pull too tight.
Waist — Find the narrowest part of your torso, usually just above your belly button. Stand naturally — don't hold your breath or pull in your stomach.
Hips — Stand with feet together. Wrap the tape around the fullest part of your hips and seat, parallel to the floor — usually about 8–9 inches below your natural waist.
🔍 Find My Size
Unit:
⬆️
Between sizes?
The one-piece runs true to size — size up if between sizes for the most comfortable fit.
2
Find Your Size
| Size | Chest / Bust inches / cm |
Waist inches / cm |
Hips inches / cm |
|---|---|---|---|
| XS | 33⅛ in / 84 cm | 25¼ in / 64 cm | 35⅜ in / 90 cm |
| S | 34⅝ in / 88 cm | 26¾ in / 68 cm | 37 in / 94 cm |
| M | 36¼ in / 92 cm | 28⅜ in / 72 cm | 38⅝ in / 98 cm |
| L | 39⅜ in / 100 cm | 31½ in / 80 cm | 41¾ in / 106 cm |
| XL | 42½ in / 108 cm | 34⅝ in / 88 cm | 44⅞ in / 114 cm |
| 2XL | 45⅝ in / 116 cm | 37¾ in / 96 cm | 48 in / 122 cm |
| 3XL | 48⅞ in / 124 cm | 41 in / 104 cm | 51⅛ in / 130 cm |
Measurements shown are body measurements, not garment measurements. Click any row to highlight your size.
Fit Tips for Diving
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True to size — size up if between
The one-piece swimsuit runs true to size. If your measurements fall exactly on a size boundary, that's your size. If you're between sizes, we recommend sizing up — a slightly roomier fit is more comfortable for a full day in and out of the water.📐
Size to your chest
For a one-piece, prioritise your chest measurement first. The torso length and bust fit are the hardest to adjust — getting the chest right is the most important factor. If your hips suggest a different size, go with your chest.🤿
Stays put under your BCD
Our one-piece swimsuit is designed to stay in place through multiple dives. A one-piece is ideal for diving as there's no gap between top and bottom — no riding up, no shifting, no adjustment needed between dives.🌊
After your first dive
Recycled polyester softens slightly with saltwater and wear. If your one-piece feels snug at first, it will relax a little after the first few dives while maintaining its shape, support, and UPF 50+ protection.🔀
Which Measurement to Prioritise
If your chest, waist, and hip measurements suggest different sizes, prioritise your chest for a one-piece. The torso fit is set — there's no separate top and bottom to mix. When in doubt, go with the larger size for comfort and range of movement.
Still not sure about your size?
We're happy to help before you order — send us your measurements and we'll recommend the best fit.
Corals planted with every purchase
Designed for divers with Sun Protection
Made to order = no excess waste
Easy returns, quality guaranteed