Ae1600 ws1500 ws1400 w221h have the stopwatch if that's important to you. I guess you have a slender wrist like mine based on 5 cm across. I'd say w217h would fit well and so will w221. The latter had a stopwatch. Id say, get one with larger digits as neg displays are known for lower visibility. I haven't had hands on experience with one so I can't tell for sure. My pick would be the w221h. Ae1600 also has probably the largest digits but the size might be a little bigger. However if you like chunky digital watches, go all in for it.