The full length cut is what separates this from the short novelty tops that pass for knight costumes, falling between 122.5 cm and 130 cm so the finished look actually reads as a knight from across a room. It pulls straight on over regular clothing with no buckles, straps, or armor pieces to assemble, which matters at events where costumes go on and come off in a hurry.
Three color families and a cloak option mean a group can match without anyone looking like a duplicate.