Pardon the leg shaking - feet in stirrups and body stressed. Made it just to the external sphincter, no issues at the meatus or spongy urethra. Worked my way up from 9mm, easily reached the internal sphincter. Tried 12 as well, stopped midway through the spongy urethra - just a bit too wide. 10mm seems to be my sweet spot
Largest I have tried. Insertion was not very uncomfortable but lots of resistance at the internal sphincter. Noticeable "pop" sensation as I finally entered the bladder.
This size is perfect for my meatus and spongy urethra. Some discomfort around the internal and external sphincters. Monitoring fluid intake and output, likely over three days.
Surprisingly quick and easy insertion. So far, fairly comfortable. The larger size fits my anatomy well, less irritating when I move, especially at the meatus.