45mm

It's barely noticeable attached to my phone, which is exactly what I wanted for everyday carry. The fit around the edges is snug and doesn't interfere with the screen at all, and it's held up fine after a few weeks of tossing it in my bag.

The 45mm size is perfect for my daily carry, and the way it snaps onto my iPhone feels super secure without adding bulk. I’ve been using it for a week now and it’s already saved my phone from a couple of clumsy drops, which is exactly what I needed.

The fit on my iPhone is rock solid, and the 45mm size feels like it was made for the phone. I don’t worry about drops anymore since it clicks on so securely and stays put in my pocket.