5'6, pretty skinny guy 26 years old, so no additional growing will be done. The one I want (and have on preorder) is the 42mm SS Classic Belt with an arrival date of July. Saw the 38mm version was shipping fast, and the 42mm Blue Sport, so I got them to see if which size would be best. First of all, the SS + Leather belt just makes the product look so much better. The Sport looks like a toy, but that's probably because of the dull aluminum and bright colors. I do like the bigger screen and (better battery life?), but combined with the blue color, it currently looks like a large toy on my wrist. I wonder if the SS + Classic belt would help remedy that issue and offset the larger size.