Universal Textiles Childrens Boys Monster Design Underwear Briefs (Pack of 5) Cotton, , Pack of boys underwear briefs with monster designs. Elasticated waist on each. Choice of 4 sizes- 2-3 Years: 36in-38.5in, 3-4 Years: 38.5in-41in, 4-5 Years: 41in-43.5in, 5-6 Years: 43.5in-46in. 100% Cotton. Machine washable.