The smaller ones are nice and stretch a lot to fit really good. The big one makes you huge. make sure to put them on dry and use lube or get really wet when using the big one. I liked using the big one best, my wife wont admit it but i can tell by the way she says lets try that one again that she likes the extra girth you get with the big one. should come in two options with all big or all small.

I fucked my wife with the big sleeve on and it made her so wet and she moaned so loud Her pussy sucked me in with that sleeve on. She couldnt get enough of it

Me and my wife purchased this item to try all of the different sensations. We have tried a few of the smaller selves and she likes the way the different textures feel. It was kinda fun experimenting with each one. They can even be used on the fingers. I have not used the larger one yet because we are concerned by the additional girth. The only downside to the product is they are a little short. The tend to bunch up at the base. I would suggest placing it on dry and then add lube.