Planning on ordering a new phone case but you’re not sure which phone size you have? 
Check the Settings on your phone, then navigate to Apple ID > Devices > Model.

The iPhone has changed a lot since it first launched in 2007, but that doesn't mean it's easy to separate one iPhone from another. The iPhones might look similar but each iPhone has its unique design and feature. So, this guide is to help you distinguish what type of iPhone you have to ensure you choose the right one.
 
Finding out which iPhone size model you have. Instruction page Phone Case Sizes.
Finding out which iPhone size model you have. Instruction page Phone Case Sizes.
Finding out which iPhone size model you have. Instruction page Phone Case Sizes.
Finding out which iPhone size model you have. Instruction page Phone Case Sizes.
Lucia Schurink