Kill by Inches.

An anxious young tailor dominated by his father, a master of the craft, is eager to do well with his clients; but his inadequacy in measuring leaves him frustrated and humiliated. His younger sister - an expert seamstress - arrives back in town, discovers his measuring weakness and begins a cruel reign of terror over him, humiliating him endlessly in front of customers. Pushed to the edge, the young tailor heads down the nightmarish road to insanity and murder.