Size Guide
Ultra-thin seamless briefs
Designed for AMAB bodies · L to 4XL
Size Recommendation
Find your size by weight
| Size | Recommended weight |
|---|---|
| L | 45 – 55 kg |
| XL | 55 – 65 kg |
| 2XL | 65 – 75 kg |
| 3XL | 75 – 85 kg |
| 4XL | 85 – 95 kg |
| Size | Recommended weight |
|---|---|
| L | 99 – 121 lb |
| XL | 121 – 143 lb |
| 2XL | 143 – 165 lb |
| 3XL | 165 – 187 lb |
| 4XL | 187 – 209 lb |
* This style runs smaller than our other seamless briefs — a 2XL here is roughly an XL elsewhere in the shop. Go by this chart only.
* Hips matter as much as weight. If your hips are fuller than your weight suggests, take the next size up.
* The knit has a lot of stretch, so a size that feels snug flat will still sit smooth worn — but a size too small will roll at the waist.
* Measurements are taken by hand and may vary slightly between pairs.
Friendly Reminders
These are in stock and ship straight away — no made-to-order wait, and no custom sizing on this style.
The pouch is 3D moulded rather than sewn from panels, so the front has no seam and shapes to you as the knit stretches.
The edges are bonded, not stitched. Cool water keeps them bonded — hot water and machine washing are what break them down.
Between two sizes, or not sure? Email your waist and hip measurement to support@prettyfemboy.com and we'll tell you which to take.
Due to the intimate nature of this product, all sales are final — no returns or exchanges after delivery. All orders ship discreetly.