These Prym button blanks made of stainless metal and a stable wire eyelet.

19mm.
You can create the right button for any of your own creations, giving you limitless possibilities for your own creativity. A gearwheel on the inside helps the fabric stretch evenly. The back of the packaging has illustrated instructions in three steps on how it works. A cutting template is also illustrated for cutting a circle in the fabric.

Depending on the textile used, the finished buttons can be washed at up to 60 degrees.