Find your swimsuit size from bust, waist and hip measurements in inches or cm for a women’s one-piece, with optional torso length, or from waist for men.
- Every Day Life And Education Calculators
- Waist to Thigh Ratio Calculator
- Waist to Height Ratio Calculator / WHtR Calculator
- Waist to Hip Ratio Calculator
Bathing Suit Size Table
| Size | Bust | Waist | Hip | Torso |
|---|---|---|---|---|
| 4 | 35 | 27 | 37.5 | 60.5 |
| 6 | 36 | 28 | 38.5 | 62 |
| 8 | 37.5 | 29.5 | 40 | 63.5 |
| 10 | 39 | 31 | 41.5 | 65 |
| 12 | 40.5 | 32.5 | 43 | 66.5 |
| 14 | 42.5 | 34.5 | 45 | 68 |
| 16 | 44.5 | 36.5 | 47 | 69.5 |
| 18 | 46.5 | 38.5 | 49 | 71 |
| 20 | 48.5 | 40.5 | 51 | 72.5 |
| 22 | 50.5 | 42.5 | 53 | 74 |
| 24 | 52.5 | 44.5 | 55 | 75.5 |
Source: Speedo Autumn/Winter 2026 catalog. These are body-measurement guide points, not guaranteed fit limits. This calculator chooses the first row at or above each component, then the largest required row; this is its own conservative lookup convention. Below-minimum components do not drive a larger row, and out-of-chart results are labeled. Check the current product’s chart before purchase.
The men’s mode retains illustrative waist bands only: XS 26–28, S 29–31, M 32–34, L 35–37, XL 38–40 and 2XL 41–43 inches. Gaps between bands remain explicit. These are not a universal or current Speedo men’s standard.
What is a Bathing Suit Size?
A bathing suit size refers to the measurement or dimensions of a swimsuit that corresponds to the body size and shape of the person who will wear it. It is typically determined by several factors including bust, waist, and hip measurements, and sometimes also includes considerations for torso length. Bathing suit sizes can vary greatly between different brands and countries, and they may be expressed in different ways, such as numerical sizes (e.g., 6, 8, 10), alpha sizes (e.g., S, M, L), or specific measurements (e.g., 34B, 36C). It’s important to note that a person’s regular clothing size may not necessarily be the same as their bathing suit size due to differences in fit and material stretch. Therefore, it’s often recommended to refer to a brand’s specific size chart when purchasing a new bathing suit.
How to Calculate Bathing Suit Size?
The following steps outline how to estimate a bathing suit size using body measurements and a size chart.
- Measure your bust (around the fullest part of the chest).
- Measure your waist (around the natural waist).
- Measure your hips (around the fullest part of the seat/hips).
- Compare each measurement with the exact product’s chart. This calculator’s women’s mode uses the four-column reference above and selects the largest required row; this arithmetic convention does not guarantee fit.
- For one‑piece suits, also check torso (girth) and consider long‑torso styles if your torso measurement runs high for your size.
Example Problem:
Use the following variables as an example problem to test your knowledge.
Bust size (in inches) = 36
Waist size (in inches) = 28
Hip size (in inches) = 40
Answer: In this calculator’s reference, bust 36 in maps to size 6, waist 28 in to size 6, and hip 40 in to size 8. A torso loop is also required: with 61 in, the torso maps to size 6, so the largest required row is size 8. A different brand or torso measurement can change the result.
