The extra-wide noodles are almost as broad as a belt, and very chewy.
Tips
culture
At a 兰州牛肉面 shop the cook pulls each bowl to the width you order. Round noodles run from 毛细 'hair-thin' up to the thick 二柱子; flat ones run from 韭叶 'chive leaf' through 宽 'wide' to 大宽, about as wide as a belt.