Unit of Measurement: The sewing machine ruler is designed with a centimeter/inch measurement unit, with the metric system as the unit. Durable: The tailor ruler set is made of high-quality plastic, durable, tough, wear-resistant and environmentally friendly. Built-in Scale: Fine lines, clear lines, high precision, not easy to wear, it is an ideal tool for manual cutting board production. Wide Range of Uses: The curve ruler is suitable for personal use, classroom use or other detailed works, such as clothing design, architecture, drawing templates, etc. Specification: Type: Sewing Ruler Material: Plastic Color: As shown Grading Ruler Size:55*5cm/21.6*2.0inch Net weight: 270.0g/9.52oz Package: 1 * 6403 Arm Sleeve Ruler 1 * 3231 Comma Curve Ruler 1 * 3250 Multi-purpose Curve Ruler 1 * Yardstick 1 * Cutting Ruler 1 * B-55 grading Ruler(55*5CM) 1 * Sewing Roulette Spacer Wheel