Small:

31 x 21mm (1.22 x 0.83 inches), recommended for dogs up to 10kg/20lb. Approximately 13 characters of text per line, including spaces, can be engraved on each line of the front of this tag. Approximately 17 characters of text per line, including spaces, can be engraved on each line of the back of this tag.

  Large:

40 x 27mm, (1.57 x 1 inches), recommended for dogs over 10kg/20lb. Approximately 15 characters of text per line, including spaces, can be engraved on each line of the front of this tag. Approximately 20 characters of text per line, including spaces, can be engraved on each line of the back of this tag.