Metal Shank Cover Buttons - 5 Sizes £0.24 Metal Shank Cover Buttons: [Choose]11mm15mm (+£0.04)19mm (+£0.08)23mm (+£0.12)29mm (+£0.18) Quantity: at £0.24 each Add To Basket 162 in stock. Self cover metal shank buttons. Available in 11mm, 15mm, 19mm, 22mm and 29mm. Perfect for creating your own fabric covered buttons to match any projects! Can be attached by hand or by using a button making tool. Works perfectly with the Prym universal self cover button tool. Sold individually.