How To Measure For Size

Use the graphic to identify the type of glans (head of penis) you have. Narrow and standard glans will use one measurement method, whereas wide glans will use a different method.

For accuracy average 3 different measurements taken at different times during the day while flaccid. If between sizes, select the smaller size, the silicone will stretch. Unless you’re a substantial grower then it’s recommended to size up when between sizes.

Note: the bell of the FMD won’t cover the glans completely. It will cover ~1/2 (from 3/8 to 5/8).

Using a flexible measuring tape or string, measure the circumference of your penis mid-shaft, while flaccid. Then use the ruler below to find your size.

Measure the width of your glans at the different depths listed in the table. Compare your width with the table’s and select the FMD size that will sit on your glans.

Note: should you find the silicone sheath is too wide compared to your shaft, you may need to double fold the sheath as shown below.