The Home Sewist's Guide to Snap Fasteners for baby clothes, bag making, and more — Kat Makes
Amazon.com: Kenkio 120 Sets Sew-on Snap Buttons Metal Snaps Fasteners Press Studs Buttons for Sewing, 8 mm and 10 mm,Black and Silver
How to rivet snap fasteners (snap buttons)
Amazon.com: Metal Snap Buttons Silver 0.30 inch Studs for Sewing 8.5mm Snap Fastener Buttons Press Button for Sewing Clothing Sew on Snap Buttons Pack of 50