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Find your fit with this O'Neill wetsuit booties size guide. Compare men's, women's, and youth US footwear sizes to select the right size for O'Neill Ninja neoprene boots.
| Bootie Size | Men's US Size | Women's US Size* | Youth US Size |
|---|---|---|---|
| XS | 5–6 | 6.5–7.5 | 8–9 |
| S | 7–8 | 8.5–9.5 | 10–11 |
| M | 9–10 | 10.5–11.5 | 12–13 |
| L | 11–12 | 12.5–13.5 | 1–2 |
| XL | 13–14 | 14.5–15.5 | 3–4 |
*Women's US sizes are approximate conversions (men's US size + 1.5), not a separate O'Neill manufacturer size chart. Fit may vary.
Use your usual US footwear size to find the corresponding wetsuit bootie size above. O'Neill products listed with numeric footwear sizes use men's US sizes.
For women, the women's column is an approximate US shoe-size conversion only. O'Neill's numeric footwear sizes are listed in men's US sizes; confirm your fit using the men's column when possible.
For youth booties, use the Youth US Size column. Youth products are identified by “Youth” in the product title.
Wetsuit booties should fit snugly without painful pressure or excessive bunching. If you're between sizes, check the fit and the specific product's sizing information before ordering.