A ruler, as used to draw straight lines and measure distances. Variously depicted as a metal, wood, or plastic straightedge with length markings at a 45° angle.
Commonly used for content concerning schooling, building, and measurement in various disciplines. May also represent various concepts of straightness and size.
📅 Straight Ruler was approved as part of Unicode 6.0 in 2010
and added to Emoji 1.0 in 2015.