It really does stretch out. If your very concerned or seems to fit too tight, put some silicone lube on it and it will weaken it altogether because silicone breaks down silicone. I accidentally did this and then it got real stretchy.

Absolutely they can get too tight. It is always recommended not to use them longer than 20 minutes at a time.

This might help some, Strangling the cock a.k.a. Cock-rings

The idea behind cock rings is to indeed restrict blood flow out of the penis. this can help keep an erection for those with ED and help the guy to last longer. Finding the correct size is important along with not wearing them for longer than 20-30 minutes at a time. Think of them like a tourniquet, if left on for too long they can cause damage to the blood vessels and/or the penis. A properly fitting ring will not hurt and can add extra stimulation to the receiver by way of a larger and harder penis. The ones with vibes also add stimulation to the partner.

It was very stretchy so I don't believe it would cut off the circulation.

Yes it can happen hun, I'm sorry to say that I knew a man who used a metal cock ring before and let's just say due to him choosing the wrong size he ended up in the hospital getting it cut off. Now I'm not saying this to scare you, but if you are just begining use a flexable cock ring and get one where you can choose the correct size, like a pack of 3. He should not wear it for more then 20-30 mins due to the fact that it is like a tourniquet keeping the blood in the penis and making it extra hard and giving it extra girth. Hope this helped you hun.

That's a great question & wondered that myself!

That is some sensitive tissue in that corpus and CAN be damaged if something is too tight. Just be careful. It is a VASCULAR organ bed. Treat it with care if you want it to last and work right.

These one's stretch so you won't have to worry too much about it completely cutting off blood flow.

ive tried a few throughout the past year and having around an average size penis ive never experienced any trouble. just dont wear it for extended amounts of time, but otherwise i think youd be fine