American Apparel Sizing What Size Should I Get For My Girlfriend For A UNISEX Sizing American Apparel V-Neck Shirt?

What size should I get for my girlfriend for a UNISEX sizing American Apparel V-Neck shirt? - american apparel sizing

I would like to TR456 Tri-Blend V-neck (or perhaps buy V-Neck 2456) for my girlfriend, but I'm confused at their ability. I tried to mix at the rankings and look up with. It is 112 lbs, 5'1-5'2ish, 34C. Should I point the XS or XXS?

It is not too tight or too loose. Please help!