All the letters and numbers are anodized black and are constructed of heavy-duty steel. Each number or letter measures approximately 1/8 (3mm). These punches are great for jewelry and other intricate designs. The number 6 can be used as 9. Each punch measures approximately 2 3/8 x 1/4 (60 x 6mm). Comes in an organized wooden storage box with labels for each spot your set stays in order. One set of 27 letter punches A - Z with the & symbol One set of 9 number punches 0 - 8 Wooden storage case Dimensions (L x W x H): 4.5 x 7.25 x 3.25 inches.