Advantage & Emollient Sizing ingredients and their characteristics, the sizing operation, and the yarn parameters play a deciding role in determining the performance of warp yarns during weaving. Hence sizing is the heart of weaving. The weaving industry today is shifting away from simply higher production speeds toward optimization of the weaving process, dependability, and fabric quality. This shift has put more pressure on the sizing area to provide materials that not only give strong loom performance but also better fabric quality.