The Apple Watch began with two simple options, but there are now three different models and four distinct case sizes to choose between. That doesn’t even include the models not officially on sale.

An curved arrow pointing right. Apple's latest device comes in two sizes, and there's a relatively easy way to figure out which size is best for your wrist. Produced by Matthew Stuart Follow BI ...

An curved arrow pointing right. Apple's latest device comes in two sizes, and there's a relatively easy way to figure out which size is best for your wrist. Produced by Matthew Stuart Follow BI ...