All day cock rings are great for flaccid gains, foreskin growth, and just feeling horny about growing a bigger dick
I ordered a set of Optimale cock rings made by Doc Johnson from Amazon and wear the smallest one daily. I am very pleased with how it is making me bigger flaccid and it is a pleasure on a bathroom break with privacy to stroke a little and get an erection or a plumper dick and let the cock ring hold that engougement.
Cock rings are fun and beneficial for growth, both flaccid and erect. I edge in mine and my veins are starting to pop out flaccid and I can tell my erectile health is better.
Go for it bro. The smallest cock ring in the Optimale set is forty MM. Get one that holds a slight engourgement but wont make your dick cold or impede blood flow to your flaccid dick too much. You may need to experiment with sizes of the cock rings depending on your flaccid girth. I am about five inches flaccid in girth and wear the Optimale cock ring only around the base of my shaft. A BTB cock ring chafes me badly and is very uncomfortable to my sack skin.