The longer one snaps in and the smaller one sits on top of that! You also can get extra insert that is about the size of a face washer that folds up to go under the long skinny snap on. I personally snap the long one on then fold it under so its doubled up then sit the smaller one on top! Hope that makes sense!!

I have found tho that my cushie tushies gape abit around the legs no matter how tight i do them up. My Ittti Bittis are a better fit all round.....I just love the Cushie Prints!!!!