Explore estimation and non-standard measurement with this set of 12 durable foam feet. Feet feature 1" increments, plus 1/4", 1/2", 3/4" and 1' markings on one side. Reverse side is blank for estimation activities. Arrange feet in a heel-toe-line to measure distance. Or, hold up an object to the unmarked side and approximate its length, then check their estimate on the marked side. Includes Activity Guide and 6 pairs of feet in 6 colors—red, orange, yellow, green, blue and purple. Feet measure approximately 12"L x 5"W x .30"D.