These Prym button blanks made of stainless metal and a stable wire eyelet are available in sizes 38mm, 23mm, 15mm and 11mm. 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.

The 23mm and 11mm sizes come with a small tool to help with attachment