Size and Fit Finder
Get your bikini top and bottom size in seconds — from a brand you already wear, your usual size, or your measurements.
Provide Some Info
Measurements in inches.
Chest sets your shirt; waist sets your shorts.
International size converter
| NautiGirl | US | UK / AU | EU |
|---|---|---|---|
| XS | 0–2 | 4–6 | 32–34 |
| S | 2–4 | 8–10 | 36–38 |
| M | 4–6 | 12–14 | 40–42 |
| L | 6–8 | 16–18 | 44–46 |
| XL | 8–10 | 20–22 | 48–50 |
| XXL | 10–12 | 24–26 | 52–54 |
US column is our house (Kulani) grade; UK/AU and EU are approximate — check each product's chart.
Men's size chart
| NautiGirl | Chest (in) | Waist (in) |
|---|---|---|
| S | up to 37 | up to 32 |
| M | 38–40 | 33–34 |
| L | 41–44 | 35–38 |
| XL | 45–48 | 39–42 |
| XXL | 49+ | 43+ |
Chest sets your shirt; waist sets your shorts — the O'Neill-based grade the finder uses. Check each product's chart.
Frequently asked
How do I find my bikini size?
Enter your bust and hips in inches, or tell us a brand and size you already wear. The finder returns a recommended top and bottom size and flags when you should buy them as separates.
Why are my top and bottom sizes different?
Most people are not the same size on top and bottom — it is the #1 reason swimwear gets returned. Buying separates in the two recommended sizes gives a better fit than a single-size set.
What if I wear another brand like Triangl or Frankies?
Switch to 'By brand', pick the brand and the size you wear there, and the finder translates it to your NautiGirl fit using that brand's sizing offset.