Calculate bathing suit size from bust, waist and hip measurements, plus bikini top and one-piece torso fit in inches or cm for swimwear.
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Bathing Suit Size Table
| Numeric Size | Bust (in) |
Waist (in) |
Hip (in) |
Alpha Label* |
|---|---|---|---|---|
| 2 | 32.5 | 24 | 34.5 | XS |
| 4 | 33.5 | 25 | 35.5 | XS |
| 6 | 34.5 | 26 | 36.5 | S |
| 8 | 35.5 | 27 | 37.5 | S |
| 10 | 36.5 | 28 | 38.5 | M |
| 12 | 38 | 29.5 | 40 | M |
| 14 | 39.5 | 31 | 41.5 | L |
| 16 | 41 | 32.5 | 43 | L |
| 18 | 43 | 34.5 | 45 | XL |
| 20 | 45 | 36.5 | 47 | XL |
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 to a size chart (like the table above) and choose the smallest size that fits all three measurements (if you are between sizes, many people size up for more coverage/comfort).
- 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: Using the size table, the bust and waist measurements are close to size 10, but the hip measurement (40 in) matches size 12, so a common recommendation is US size 12 (M) (brand fit and stretch can vary).
