Width: 12.54mm, Approximately 1/2"
Length: 139.7mm or 152.4mm, Approximately 5 1/2" or 6
Thickness: 1.28mm, Approximately 1/16"
Opening: 19.05mm-25.4mm, Approximately 3/4"-1"
Please note that the images of the letters, numbers, and enamel pieces are for visual reference only, actual product may vary slightly in shape, size, and color from what is pictured.