Tag Aquaracer 500M, Breitling SuperOcean Heritage, Cartier Pasha SeaTimer, Vacheron Constantin OverSeas (white dial, non-chrono)
Some of these do not fit into your size wish list BUT they are all great pieces.
Honestly ... why not go for the newest Rolex Ceramic Sub for her? Shiny ceramic bezel, polished midlink bracelet ... get it in Blue! Women can rock Submariners. Ask Sharon Stone
I do not know or trust the seller in this photo .. I only use this photo to demonstrate my point to you.