Recommended usage: 1 month
The cup is the same for all sizes but the membrane that seals around the penis are available in 3 sizes: small, medium and large.
To find your size measure the approximate circumference of the penis shaft (flaccid) with a tape measure.
- Small circumference of 25-35 mm
- Medium circumference of 30-40 mm
- Large circumference of 35-45 mm