Oberon makes such beautiful stuff. I've had an old-style phone sleeve from them for years and my new phone just didn't fit in it. Because this is leather, it will stretch, which is good because my phone was at the upper limit of what this will hold, and wouldn't even go in at first because I have a grippy case on it. But with stretching over the course of a week (stuffing things into it at night and any other time I was using the phone) it's stretched out to fit. This seems to me to be a normal thing for leather - remember shoe stretchers?? Anyway just be prepared. The teeniest bit of extra slack in the material would have been nice, but it's working out anyway, and this is so gorgeous it is worth the effort.
a couple of years ago my husband bought me the smaller smartphone wallet. I loved it, perfect for me. then i upgraded my phone and needed a bigger wallet. I received it much sooner than expected, and it's great. It fits my phone exactly. but be aware, the phone will not fit into the wallet if it's in a case, so i just take the case off the phone when I put it in the wallet to go somewhere.
Our slim phone cases will fit inside the wallet but if you are using a bulkier case, it may not, it's true.