Store › UOC - Classic Patch UOC - Classic Patch $12.00 Patches. Sew on, iron-on, pin on. You know what they're for. • 26% cotton, 74% polyester • 3″ (7.6 cm) in diameter • Attachment options: iron-on, sew-on, or safety pin. Patches. Sew on, iron-on, pin on. You know what they're for. • 26% cotton, 74% polyester • 3″ (7.6 cm) in diameter • Attachment options: iron-on, sew-on, or safety pin. Quantity: Add To Cart Added!