Standard: 14" x 10.25" x 1.25" One line version holds up to four 4" numbers or five 3" numbers. Two line version holds up to five 3" numbers and fourteen 1.25" characters. Estate: 20.5" x 12" x 1.25" One line version holds up to five 5.5" numbers. Two line version holds up to five 4" numbers and fourteen 1.75" characters.