*measurements are in the photos OshKosh B'Gosh Denim Blue Jean Overalls Polka Dot Size 18M is a one-piece unisex baby and toddler overall made of 100% cotton denim fabric. It features a vestbak, buckle and snap closure, and is machine washable. The overalls come in blue with polka dots and are suitable for travel, activewear, party, and casual occasions. The set includes jeans and is perfect for all seasons.