12 noon-184.108.40.206 - a skaters number may contain up to four characters.220.127.116.11 - a skaters number must be alphanumeric with at least one numerical digit. for example: l5 is an acceptable number, but lv is not. numbers cannot contain symbols.18.104.22.168 - a skater may have small characters preceding or following their skater number on their jersey e.g. 55 mph, where mph is considerably smaller than 55. these small characters are not considered part of the skaters number and they may not inhibit the legibility of the skaters number whatsoever. the maximum size for the small characters is 2 inches (5 cm).