Half inch, dimensional matte antique silver color, this button was called Timur by JHB back in the day when it was made. It's roughly a rectangle and 1/2" is the long way. The short dimension is a bit smaller. Shank opening around 2mm. Age unknown, made in Spain. New, never used JHB button. $1.75 each. Limited Supply.

Also available larger, see # FJ-72