Gauge is not critical for this project. A larger button may be made using thicker thread and a larger hook size.

Materials
Steel crochet hook, size 12
Metal button mold covered with fabric, 1.5” (3.8cm), size 60
Plastic (PET) soda bottle
1/4” paper punch
1/8” paper or leather punch

Soda bottle and paper punches are for creating a foundation ring for the bullion stitches