Measuring is the most difficult part for starters. I recently switched to a new device which is very comfortable even for early morning erections. But the base ring stand/fixes partly on my shaft and not on the base of my ball sack.This way it "holds" the shaft when I'm erect and hangs on my shaft when not erect. The problem? I think I'm able to pull my shaft out if I pull it backwards in turtle mode. What do you think? Does your base ring sits on top of you shaft or stands on the base of ball sacks? Is my ring too loose?