[amarshall]

Given the same diagonal size, a more-square display has a greater total area. So a 16:10 13" display has more area than a 16:9.

[fomine3]

We should stop using diagonal size metric for display. It's fine for TVs that have fixed aspect ratio, but confusing for multiple aspect ratio.

[amarshall]

Agreed. Along with that the ambiguous 1080p, 1440p, etc. monikers. So much shorthand assumes the aspect ratio. Plenty of displays that are 21:9, 16:10, 3:2, etc.

That said: diagonal size with an aspect ratio, e.g. “13" 3:2”, is fine.