U.S 18" Inches | U.K 46 Centimeters
U.S 20" Inches | U.K 51 Centimeters
U.S 22" Inches | U.K 56 Centimeters
U.S 24" Inches | U.K 61 Centimeters
U.S 26" Inches | U.K 66 Centimeters
U.S 28" Inches | U.K 71 Centimeters
U.S 30" Inches | U.K 76 Centimeters