To me, these are the best size for larger hoops - not too big, and not too small, and also not too thick. It is hollow inside, but feels tough enough to not get deformed - I have worn it to sleep without it getting bent out of shape. The click backs are okay, though not the most secure and I find myself having to push the Y bits together when they get loose. The other reason I didn't give it 5 stars is that the gold colour is very muted - must be a very thin layer(as noticed by another reviewer). But for the price, I suppose I could not expect a thicker coat of gold!