Size Guide
Finding your fit shouldn't feel like guesswork — especially if your body's changed since the last time you shopped for a swimsuit. Use the guide below to find your POST SWIM size, and check each product page for style-specific fit notes (some of our suits run a little small, so we call that out where it matters).
Compare these measurements to a similar garment you already own — lay it flat and measure from the outside — for the most accurate read on your size.
POST SWIM Size Guide
| X-Small | Small | Medium | Large | X-Large | |
|---|---|---|---|---|---|
| Bust | 30–32 in. | 32–34 in. | 34–36 in. | 36–38 in. | 38–40 in. |
| Waist | 24–26 in. | 26–28 in. | 28–30 in. | 30–32 in. | 32–34 in. |
| Low Hip | 34–36 in. | 36–38 in. | 38–40 in. | 40–42 in. | 42–44 in. |
| Dress Size | Sizes 0–2 | Sizes 2–4 | Sizes 6–8 | Size 10 | Size 12 |
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Trulife Active Flow Size Guide
| Trulife Active Flow Size | Bra Size | Band Size (in/cm) |
|---|---|---|
| 5 | AA – A – B – C | 36/80 – 34/75 – 32/70 – 30/65 |
| 6 | AA – A – B – C – D | 38/85 – 36/80 – 34/75 – 32/70 – 30/65 |
| 7 | AA – A – B – C – D | 40/90 – 38/85 – 36/80 – 34/75 – 32/70 |
| 8 | AA – A – B – C – D – DD | 42/95 – 40/90 – 38/85 – 36/80 – 34/75 – 32/70 |
| 9 | AA – A – B – C – D – DD | 44/100 – 42/95 – 40/90 – 38/85 – 36/80 – 34/75 |
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This prosthesis is designed for use with pocketed mastectomy swimwear and is compatible with select POST SWIM styles. It is intended to sit securely and smoothly against the chest for a natural, supported silhouette.
We currently offer sizes 5–9, thoughtfully selected to support a wide range of band and cup sizes within our community. As POST SWIM continues to grow, expanding our size offering is something we care deeply about.
For best results, we recommend pairing with properly fitted pocketed swimwear to ensure secure placement and optimal comfort.
A note on fit: A few of our styles run one size small — when that's the case, it's called out directly on that product's page (like Judy, which we recommend sizing up on). When in doubt, check the fit note on the style you're shopping before you order.
Still not sure? Email us at sales@postswim.com — we're happy to help you find your fit.