I bought this to house my Samsung Galaxy S8. The phone fits PERFECTLY in the sleeve..without a case. The problem is, I have a small Otter Box case on my phone, and with that on, it does not fit. It will fit in if I force it but then it kind of gets stuck in there and the top will not close. So, if you have an S8 sized phone and don't use a case, this thing is perfect. Anything bigger, or with a case, you had better look elsewhere.