Swim Size Chart
Swimwear should fit more snugly than everyday clothes because fabric relaxes in water. Measure your bust, waist, hips and torso, then use the size finder and charts to find your likely size in US, UK and EU sizing — plus tips for one-pieces, bikinis, cup-sized tops, trunks and children’s swimwear.
Swimwear Size Guide Pack
Printable swimwear size guide: women’s, men’s and kids’ swim size charts, a body measurement worksheet, a torso length guide and a family size record.
- Women’s chart (PDF/XLSX)
- Men’s & kids’ (PDF)
- Measurement worksheet (PDF/DOCX)
- Size record (XLSX)
Formats: PDF, XLSX, DOCX. Instant download after payment (link valid 72 hours, up to 5 downloads). AI-assisted: the templates were drafted with AI help and reviewed and laid out by Kedop.
$5.00 USD, one-time
Secure card checkout by Stripe. Full refund within 7 days — see the refund policy and license.
Swim size finder
Women’s swimsuit size chart
| Size | US | Bust (in) | Waist (in) | Hips (in) | UK | EU |
|---|---|---|---|---|---|---|
| XS | 0–2 | 31–33 | 24–26 | 34–36 | 4–6 | 32–34 |
| S | 4–6 | 33–35 | 26–28 | 36–38 | 8–10 | 36–38 |
| M | 8–10 | 35–37 | 28–30 | 38–40 | 12–14 | 40–42 |
| L | 12–14 | 37.5–40 | 30.5–33 | 40.5–43 | 16–18 | 44–46 |
| XL | 16 | 40.5–43 | 33.5–36 | 43.5–46 | 20 | 48 |
| XXL | 18–20 | 43.5–46 | 36.5–39 | 46.5–49 | 22–24 | 50–52 |
These are typical body measurements across many brands. Some swimwear brands run small or use their own charts — check before you buy.
Cup-sized swimwear
Many brands now sell bikini tops and one-pieces by bra size (for example 34D) or by dress size plus cup group (such as “M, D–DD cup”). If you wear a D cup or larger, cup-sized tops with underwire or moulded cups give better support than standard triangle tops. Use your well-fitting bra size as the starting point; swim tops with thicker, firmer bands may feel slightly tighter than your bra.
Torso length for one-pieces
One-piece swimsuits have to fit your torso as well as your bust and hips. Measure torso length by running a tape from the top of one shoulder, down through your legs and back up to the same shoulder. Women with a long torso (often over about 64 inches / 163 cm on this loop measure) may find standard suits pull at the shoulders or ride up; many brands offer “long torso” one-pieces.
Men’s swim trunks
| Size | Waist (in) | Waist (cm) |
|---|---|---|
| S | 28–30 | 71–76 |
| M | 31–33 | 79–84 |
| L | 34–36 | 86–91 |
| XL | 37–39 | 94–99 |
| XXL | 40–42 | 102–107 |
| 3XL | 43–45 | 109–114 |
Board shorts are commonly sized by waist in inches (30, 32, 34…). Inseams range from about 5 inches for short trunks to 9–11 inches for board shorts.
Kids’ swimwear sizes
| Size | Height (in) | Approx. age |
|---|---|---|
| 2T | up to 37 | 2 years |
| 3T | 37–40 | 3 years |
| 4 | 40–43 | 4 years |
| 5 | 43–46 | 5 years |
| 6 | 46–49 | 6 years |
| 7 | 49–52 | 7 years |
| 8 | 52–55 | 8 years |
| 10 | 55–58 | 9–10 years |
| 12 | 58–61 | 11–12 years |
| 14 | 61–63 | 13 years |
| 16 | 63–66 | 14+ years |
Children grow quickly and swimsuits stretch, but a suit that is too big can sag and slip in the water. Choose by height, then check chest and waist.
How to measure
- Bust: measure around the fullest part, keeping the tape level under the arms.
- Waist: measure around the natural waist, the narrowest part of your torso.
- Hips: stand with feet together and measure around the fullest part.
- Torso (one-pieces): shoulder, through the legs and back to the shoulder.
- Measure in underwear, keeping the tape snug but not tight.
Worked example
A woman measuring 36-inch bust, 29-inch waist and 39-inch hips falls into a size M (US 8–10) for bust, waist and hips alike, so the finder suggests an M one-piece, M bikini top and M bottoms — UK 12–14, EU 40–42. If her hips were 41 inches, it would suggest L bottoms with an M top: a good case for mix-and-match separates.
Fit tips
- Swimwear should feel snug when dry — it relaxes when wet.
- Straps shouldn’t dig in; the back band should stay level.
- Bottoms should cover without cutting into the hips.
- Try a few movements — squat, raise your arms — before you commit.
- Rinse in cool fresh water after each swim to protect the fabric from chlorine and salt.
Frequently asked questions
Should swimwear be tight?
Snug but comfortable — swimsuits loosen slightly when wet.
What size swimsuit if I’m between sizes?
For one-pieces, go by the larger measurement; consider separates if top and bottom differ.
How do I convert US swimsuit sizes to UK?
Add about 4: US 8 is roughly UK 12.
What size swim trunks for a 32-inch waist?
Usually a medium, or a 32 in waist-sized board shorts.
What is a long torso swimsuit?
A one-piece cut longer between shoulder and crotch for taller bodies.
Is my data stored?
No, the finder runs in your browser.