riangular scale ruler 1:500-1:2,500 Light, portable, and ideal for technicians and professional use. Scale : 1:500 / 1:1,000 / 1:1,250 / 1:1,500 / 1:2,000 / 1:2,500 Dimensions (L x W x D) : 375 X 38 X 38 mm.