This crystal ashtray is marked 'Canada 21' in the middle of the bottom of the ashtray.  It is 6.75" across the top from one side to the other, and the inside measures 5.25" wide.  The outside height measures 1.75", and the inside height measures 1.25".  There are 4 spots to hold cigarettes along the outer edge.  It is in wonderful condition, with no scratches or chips. The ashtray itself weighs 1 pound, 15.6 oz.