2 1/4" X 3 7/8" (56mm X 97mm)

(dome inkstamp)    

{Richard Ginori}

Picture courtesy Bob Berry

2 1/4" X 3 7/8" (58mm X 97mm)

(skirt inkstamp) 4-56

{Ceramica Ligure}

Picture courtesy Bob Berry

2 1/4" X 4" (56mm X 102mm)

(dome inkstamp)    

{Verbano}

Picture courtesy Dave Dangora

2 3/8" X 4 1/8" (60mm X 104mm)

(dome inkstamp)    

{Verbano}

Picture courtesy Dave Dangora