Cock ring EDIT

So I ordered a package from Adam and <a href="https://play.google.com/store/apps/details?id=com.glow.android.eve">Eve</a> for the first time for my hubbies bday. We got a free cock ring it was jelly feeling and small. We decided to try it why did that thing keep coming off inside me!! Lmao my poor husband had to keep going in and trying to get it out 😂 how do they work??? Did we do something wrong??? Lol it sucked but after we took it off we had good sex. Lol but we wanted to try something new. Any pointers???

EDIT: he actually has a pretty good size thick penis. It was weird because it was small and we tried putting it by the head. And then again near the middle and the end. It didn't do much. We'll try a even smaller one and see.