This chart applies to all sinceshe period underwear. Use your waist and hip measurements to find your size. Individual products may not offer every size listed — the chart is kept wide so future products can use the same scale. If you are between two sizes, choose the larger size for comfort and leak coverage.
How to measure
Use waist and hip together. If waist and hip point to different sizes, choose the size that matches your hip, then check waist comfort.
| Size | US Pant Size | Waist (in / cm) | Hip (in / cm) |
|---|---|---|---|
| XS | 2 | 25-26 / 63.5-66.0 | 35-36 / 88.9-91.4 |
| S | 4-6 | 27-28 / 68.6-71.1 | 37-38 / 94.0-96.5 |
| M | 8 | 29-30 / 73.7-76.2 | 39-40 / 99.1-101.6 |
| L | 10-12 | 31-32 / 78.7-81.3 | 41-42 / 104.1-106.7 |
| XL | 14 | 33-34.5 / 83.8-87.6 | 43-44.5 / 109.2-113.0 |
| 2XL | 16 | 35.5-37 / 90.2-94.0 | 45.5-47.5 / 115.6-120.7 |
| 3XL | 18 | 37.5-38.5 / 95.2-97.8 | 48.5-49.5 / 123.2-125.7 |
| 4XL | 20-22 | 39.5-40.5 / 100.3-102.9 | 50-51 / 127.0-129.5 |
| 5XL | 24 | 41-42.5 / 104.1-108.0 | 52-53 / 132.1-134.6 |
| 6XL* | 26-28* | 43-44.5* / 109.2-113.0* | 54-55.5* / 137.2-141.0* |
* 6XL values are extrapolated from the XS-5XL grading trend. To be confirmed with supplier samples before launch.
Corrected version of the previous Plus table: the stray single X column has been removed, and four cells have been corrected to keep grading monotonic and fill gaps (marked *). Use the same waist + hip method as Standard.
| Size | US Pant Size | Waist (in / cm) | Hip (in / cm) |
|---|---|---|---|
| XS | 0-2 | 23-25 / 58.4-63.5 | 33-35 / 83.8-88.9 |
| S | 4-6 | 26-28 / 66.0-71.1 | 36-38 / 91.4-96.5 |
| M | 8-10* | 29-31 / 73.7-78.7 | 39-41 / 99.1-104.1 |
| L | 10-14* | 32-34 / 81.3-86.4 | 42-44 / 106.7-111.8 |
| XL | 16-18 | 35-37 / 88.9-94.0 | 45-47 / 114.3-119.4 |
| 1X | 18-20* | 38-40 / 96.5-101.6 | 47-49* / 119.4-124.5* |
| 2X | 20-22 | 42-44 / 106.7-111.8 | 49-51 / 124.5-129.5 |
| 3X | 24-26 | 46-48 / 116.8-121.9 | 53-55 / 134.6-139.7 |
| 4X | 28-30 | 50-52 / 127.0-132.1 | 57-59 / 144.8-149.9 |
* Four corrected cells: M US (was 8, now 8-10 to fill the gap to L), L US (was 12-14, now 10-14 to fill the gap from M), 1X US (was 16-18 duplicate of XL, now 18-20), 1X Hip (was 45-47 duplicate of XL, now 47-49). Source Plus table also had a stray X column (US 14, Waist 36-37, Hip 43-44) that has been removed. All corrected values to be confirmed with supplier size charts and samples before final use.
For teen styles, use hip as the primary measurement. Waist follows the same method as above. If hip is between two sizes, choose the larger size.
| Size | Hip (in / cm) | Youth / Adult Reference |
|---|---|---|
| XXS* | 28-30 / 71.1-76.2 | Youth 10-12 |
| XS* | 30-32 / 76.2-81.3 | Youth 14-16 |
| S* | 32-34 / 81.3-86.4 | Adult XXS / Youth 16+ |
| M* | 34-36 / 86.4-91.4 | Adult XS |
| L* | 36-38 / 91.4-96.5 | Adult S |
| XL* | 38-40 / 96.5-101.6 | Adult M |
* Teen values are derived from the adult grading trend and teen product size logic (hip-primary). To be confirmed with supplier size charts and samples before launch.
This page is the standalone sinceshe period underwear size chart. It does not rely on the Kiwi pop-up. The Kiwi pop-up remains on product pages for now and has not been removed.