The size is listed as S and M, but I'm listing it as size 80 because that's what fit perfectly when I used to wear 80-size clothes. It's thin, so it's recommended for the coming season. This is a used item with a feeling of wear. The inner tag has my name on it, which has been crossed out with double lines (there are multiple). I am also selling on other sites, so please comment before purchasing. I have guinea pigs, but they are kept in a separate room. Feel free to ask any questions! Type... Long sleeve T-shirt - Color: Dark blue and stripes - Design: Buttoned, fringed neckline - Sleeve style: Long sleeve, striped design Thank you for viewing. #BabyWinterClothes #LongSleeveShirt80 #NavyTShirt #Iketchi80Size