This easy worksheet helps second graders compare lengths to a familiar benchmark: the classroom door. Students sort a lamp, tree, chair, flagpole, backpack, and telephone pole as shorter or taller than a door, then fill in length facts like a glue stick being about 4 inches, a door being about 7 feet, and a quarter coin being about 2 centimeters. True-or-false statements check that a basketball hoop sits 10 feet high and that centimeters are smaller than inches. The sheet builds estimation sense and unit awareness through objects kids see every day.