I just had to point you in the direction of this adorable vintage-inspired plaid bikini.
It's from Mod Cloth, and is available in sizes 16-26. I'm not currently in the market for a bathing suit, especially since I don't swim often, but if I were I would be all over this. It is too cute for words!
Maria of Lulu Letty wears the straight size version of this bikini here.