Find your size in 10 seconds
Two questions, one size.
Tell us your waist and how you like your briefs to feel. We'll suggest a size — and you can fall back to the measure-and-chart method below if you'd rather double-check.
Or measure & check the chart
How to measure
01
Grab a tape
Soft fabric tape, or a piece of string and a ruler.
02
Find your waist
Narrowest part of your hips, 2–3 cm below your navel.
03
Note your number
Two fingers under the tape, in cm or inches.
Size chart
| SULLIOS SIZE | WAIST | BEST FOR |
|---|---|---|
| S | 71–76 cm 28–30 in | Slim to average build |
| M | 79–81 cm 31–32 in | Average / athletic build |
| L | 84–86 cm 33–34 in | Broader build |
| XL | 89–91 cm 35–36 in | Larger / muscular build |
Measurements are natural waist circumference.