Both are size 100. The MUJI long-sleeved T-shirt has some slight staining on the cuffs. Please check the photos. I'll discount it accordingly. The GAP cut-and-sew top is an emerald green color and looked cute with skinny jeans. Would you like them for everyday wear? Please understand that these items are stored at home, have been inspected by an amateur, and will be simply packaged. I'm also selling other children's clothes, so I'd be happy if you took a look. #MUJI #GAP #Kids #Size100 #LongSleeveTshirt