BIRTHDAY GIFTS: Celebrate a 21st birthday with these festive socks. They feature birthday gifts, hats, balloons, and other elements on the top, while the bottom is sewn with a hilarious hidden message: "CHEERS & BEERS TO MY 21 YEARS". SIZE: 21st birthday gifts for her and him. Our unisex design fits most men's US size 6-13 feet and most women's US size 7 and up. QUALITY MATERIAL: Gifts for 21 year old male and female. Our funny saying socks are made of 80% cotton, 15% polyamide and 5% elastane to ensure they are soft, comfortable, stretchy and breathable. They won't fade and are machine washable. HAPPY 21ST BIRTHDAY: They make great gifts for your son, daughter, sister, brother, or friend.