C. S. Osborne & Co. No. 229-20 Durable Snap Setters , Size 20 only for Baby Snaps. Comes with flaring tool, a double-sided die and instructions. 47.3lY C. S. Osborne & Co. No. K3721-24-C Steel Antique Finish Snap Set, Size 20 Baby Snaps. Size 20 snaps have 1.3cm diameter. ( MPN # 14256) Set of 4 pcs. snaps (cap, socket, stud & eyelet).