Here is a group of 18 assorted clear glass furniture coasters or gliders. These were popular in the Depression Era to place under the legs of furniture and protect the floors. There are five 3" size, 3 of which have the HA mark for Hazel Atlas. There are thirteen 2 1/2" size, 3 of which also have the HA mark. Some have been heavily used, with chips to the inside rims and damage to the inside surface where the legs rested. Others are in perfect condition.