Approximately 7/8”, NBS medium, good condition.
Mack buttons are made in Stoke-on-Trent, England by a couple once employed by Royal Doulton. Each button is handmade, the porcelain poured into a mold that holds 10 buttons at a time. There are a number of steps for each button, all being done in a small workshop space attached to their home. Once out of the mold, the edges are smoothed off and then the edge color is hand-painted. The pictures are decals that are hand applied and then there is one more visit into the kiln for firing. The decals are from the Netherlands.