The tag only states the washing instructions so I have no idea on the size but I have made measurements from the nap of the neck in the back down to the bottom of the leg is 23 inches Pitt to pit is 10 inches Inseam is 8 inches the arm opening is 3.25 inches in the length of the zipper is 9.5Vintage Childs Jumpsuit Zip Up Boys. Shipped with USPS Priority Mail. 116