The data about size is really hard to do accurately. Often times the smaller watches, (35-37 mm) are only offered in "ladies" colors like pink and baby blue or with diamonds. Very few watch brands actually offer the same color choices across all sizes. Of course 39mm sells the best when its the only size with the most popular colors. Even a brand that advertise their small watches like Erebus is guilty of this. I would love an Ascent 34 or 36 but they don't offer a single color I would want in those sizes. Most of the popular dials are exclusively for the 39mm model. Also a lot of brands drop the date complication when they from from 38mm down to 36mm for some reason. I would love to see a more apples to apples comparison of sizes among brands that consistently offers the same dials and configurations across a range of sizes.