i have a google pixel XL which is slightly smaller than iphone 11 plus. It fits diagonally in the back compartment of my teen box. When i close it, you can see the phone is poking the side out a little (not wider than the bag). But it i wear it like that for long, it's gonna change the leather shape on the sides.I have an iPhone 11 Plus, I don’t think it would fit in a Small Classic Box, how about Teen Classic Box? I love the idea of a smaller bag, but won’t go for it if it’s can’t hold my phone. Thanks!