Ruler actual size image
Image Accuracy = 52 %
DimensionsWidth: 50 (mm), 1.97 (in)
The image size is or
A ruler, sometimes called a rule or line gauge, is an instrument used in geometry, technical drawing, printing and engineering/building to measure distances and/or to rule straight lines. Strictly speaking, the ruler is essentially a straightedge used to rule lines, but typically the ruler also contains calibrated lines to measure distances.