Infant Pirate Costume - Baby Pirate Boys Costume 6-18 months One size fits most wearing 6-18 month clothing - up to 25 lbs Fabulous unique baby pirate costume for little boys features easy pull on elastic waist pant and matching pirate shirt and hat in comfortable cotton poplin with black soft felt infant pirate hat. One size fits child wearing size 6 to 18 month or weighing up to 25 pounds. This infant pirate costume is adorable!