This ruler is ideal for sleeve caps, necklines, armholes, and hips. Its right side is a 16" long straight-edge ruler with 1/8" grid marks. The styling design ruler also has a few basic illustrations for quick how-to reference while work is in progress. The styling design ruler is versatile because of its combination of markings and curves. Use this ruler for basic techniques like lowering/raising an armhole, adjusting darts, or increasing/decreasing the waist of a skirt.