[SRPD61K1] How's the fit in your guys' opinion?

Hi everyone! I'm in search of my first Seiko (and first automatic watch). I love the look of these 5 sports series SRPD's but I'm curious in what you guys think about the sizing on my 6.4 inch wrist. Also I do know there's a smaller SRPK version of this SRPD but in my opinion 38mm is too small for a dive or dive style watch. Anyway, let me know what you think!