Hartmann-Knöpfe Pack of 6 shiny silver 4-hole buttons that impress with their imperfect shape, available in 4 sizes (6 pieces) (12 mm) : Amazon.de: Home & Kitchen
Amazon.com: Konak Buttons Set of 22 Premium Genuine Black Buffalo Horn Blazer Buttons with Polished Round Rim for Sport Coats (Black 6pcs 20mm 16pcs 15mm) : Automotive
Amazon.de: SUNTATOP 200 Stück Knöpfe Harz Knopf Set Basis Knopf für DIY Nähen,Scrapbooking und Handwerk Verzierung,10mm 15mm 20mm (8 Farben)