Prym Flexi Buttons with Loop Silver 19 mm - Yarnplaza.com
Prym Universal Tool for Cover Buttons 11-29 mm, Brass, Blue, one Size : Amazon.co.uk: Everything Else
Buttons | John Lewis
Wonder Buttons. Assorted. 11mm, 15mm, 19mm | Sew Essential
Silver, 1000pcs) PRYM Small 4GB S Spring Press Studs, 15mm Brass Snap Fastener Matt Black Plastic Cap No-Sew Buttons for Clothing, Wallets, Clutches, Jackets on OnBuy