Henry Armstrong was only 5'5' and he reigned in the welterweight but was denied of the middleweight crown when held to a controversial draw by Filipino champion Ceferino Garcia. At that time there still was no light middleweight division but I am dead sure he would have won the title there too if there was one.

Pernell Whitaker I think is officially the shortest welterweight and light middleweight champion at only 5'6" followed by Manny Pacquiao who was just half an inch taller.

Pernell Whitaker

tony canzoneri the 3 weight champion was 5'4 and fought up to welter but he the highest weight he held a belt was light welter .

Isn't Gavin Reese about 5,3 or 5,4 and he was Welterweight champ

pac?

well he's only 169cm in height...

anybody you know shorter than that????

wtf, yea, pernell is only 168cm