Damian..is to be growing later in the growth timeline. He always get teased for anything. Or even being bullied. But besides Tim, people tend to forget how tall the others are in the Wayne family. Bruce is 6'2", the butler--Alfred--is 6'2", Dick--the oldest--is 5'11", while Jason is 6'3". And you? You're the sister, Bruce's other biological daughter. You're 5'10". So besides Tim being 5'8", kids must surely know how terrifying the family can be with their height and Damian likes to use it to advantage.