Best razor for legs?

After trying and trying to get my gf to try a straight and actually shaving her legs for her. I kind of quit haha but randomly after I got out of the shower I asked her if she wanted to make the lather for me so I showed her how then she she asked if she could try and picked up my 7/8 wade and butcher ( I gave her a different one) anyway she loved it and now wants her own razor...and a pink handled brush But she wants my 4/8 extra hollow imperial because she likes the scales on it haha. My question is what would be the best size and grind as I have about all you can short of an 8/8

I would think 4/8 or 3/8.

Or something like this.
http://www.jons-swords.com/images/st...ors/sr44ap.jpg

2-7/8" long blade x 4/8" Solingen Steel.

I have one that I am think of refurbing and selling it is about the same length but a 2/8 I think.