Got these as our free toy. Im sure these would suite someone out there so i cannot say they don't do what they are meant to. Just way to tight for me and I wouldn't say Ive got much girth. They do restrict flow and thats what they are meant to do. Get quite a few in the packet and for free i can't complain. Restrict flow to my thumb let alone penis. Good luck. Someone out there will find these great I'm sure.
I love cock rings. Yes, these stretch and wear out, but they do an excellent job and are good value for money.
Check your penis for blood supply