Mice sizes for KSB?

[jae]

In the next month, I will be buying a Kenyan Sand Boa, my first snake, although not first reptile. Everything will be prepared within the next week or two, but I'm a little confused on what size mice I should buy. I most likely will be getting a baby, but I don't know how much of each size I should be buying. How fast will they grow? I don't particularly care whether or not I get a male or female. I will be the buying the mice at a reptile show, but I will probably buy them from an online source (any recommendations?). I know that there's a chart around for Ball Pythons, but anything for a sand boa? Thanks.