Ok, ya'll 'splain sumtin to me. I have been looking at ordering a waistcoat for piping. I understand that the chest measurement is needed just like jacket, but why do you have to specify short, medium or long. There are no sleeves! Or, does this refer to the length of the waistcoat itself? (Measured down the back from the neck). If so what measurement would be concidered short , medium or long?

Thanks!