This is what I’d call a near perfect fitting of a male chastity device. When in doubt, go smaller. Although the male may protest, once fitted, the cock and balls will ultimately be more comfortable. It is imperative that pubic hair be shaved or trimmed very shorty. Here you can see that there is no hair to be pulled or tangled in the mechanism, His small penis has no room to grow, hence a more comfortable feeling for both of you. Finally, not how the steel lock has been secured to the device with a simple rubber band. This prevents the lock from clanking against the steel while in public. There is absolutely no reason that this device cannot stay on for days at a time.