The red buds in these focal buttons are made with a glassworking technique that's been adapted for clay.  Rods of clay of varying size, shape and color are fused together to form a long "cane".  I take tissue-thin slices from these canes to form the designs on the buttons.
The dimensions are 2" by 2 1/8"
The button is washable.  Line dry it, but don't dryclean it; it won't withstand drycleaning.