Thanks everyone. I just went to the pet store and put them all on scales, this wasn't a digital scale, so who knows how close it is.

My male (possible albino het) is 290g, The two females were 340 and 400 respectivley. I was shocked, I sort of want a second opinion on a different scale. The 400g female is the one that I am probably adopting. I was also told that maybe they're a little small because of food, so I stepped up to the jumbo mice (quite a bit larger than what they've been getting) and maybe small rats in the near future.

Looks like its next season for sure =)