Stick-On Wallet - ID/Credit Card Holder For Cell Phones - Strong 3M Adhesive - Universal Size fits most Phones (including iPhone 6s, 6, 5, Samsung Galaxy S6, S5) By Sticky Smart Wallet

Didn't buy it on Amazon but love it. Have been using it every day for the last seven months and it is performing great. Like another reviewer, it has lifted slightly at very bottom corners as my phone has a curved back but it is still very securely attached. I have had no problem with the wallet compartment becoming stretched and the cards stay put. Everyone asks about it and am about to buy another for daughter.