this is the width in inches. google can always do the math for you type in
5/8in in cm and see what happens....










see, now, how's that for a search engine
(5/8) in = 1.5875 centimeters

(6/8) in = 1.90500 centimeters

(7/8) in = 2.2225 centimeters

(8/8) in = 2.54 centimeters

(9/8) in = 2.8575 centimeters (Ilija)
(12/8) in = 3.81 centimeters (JLStorm)

(I only have 5/8 so I can't vote)