This page contains non-sexual illustrations of male genitals.
Navigate through the images to find the one that best matches your current most frequent flaccid coverage
What is FCI? The Flaccid Coverage Index (FCI) is a standardized scale from 0-10 that measures foreskin coverage levels when flaccid, helping determine the appropriate retainer length for your tugging journey.
A retainer is a device that holds loose skin in place over the glans during your tugging journey.
Super Tight Cut
This is a tool to help you get close to the best length device. However, everyone's skin has varying levels of stretchiness, so use these results as a starting point, not a definitive answer.