My wife is 5'3" and she likes them. She said they could be a touch lower but width isn't a problem.
I will add that the bedliner option gives them a nice grippy texture that gives you confidence when you step that your foot won't slip. Can't tell you how many times I stepped up on the flat boards on my old truck when it's wet/icy and my foot would slip and I'd end up kicking the bottom of the door with my shin
With that being said, my only real concern with these boards is that they only coat the top and sides of the boards with bedliner, but the underside is still just plain textured powdercoat that will be exposed to salt and rocks (and will ultimately chip and rust).
Hope that helps!