Design: the corners of the ruler are provided with radians, which are not easy to harm your hands, each ruler has different patterns and scales, can meet your needs Use occasions: These templates fit for house planning, geometry drawing in mathematics, art work, architecture, fractional measurement, useful supplies in the school and office. Specifications: Double scale building ruler: 24.3 x 9.5 cm Building template: 19.9 x 8.9 cm Furniture building template: 19 x 9 cm Geometric drawing template: 22 x 10 cm Irregular geometric template: . 19.4 x 10 cm Quantity: 6 pieces Color: green material: plastic Package Contents: 2 * Double scale building ruler 2 * Building template 2 * Geometric template Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.