This set is newer than some of our other sets in that the metal holders of the wheels are not made of the old iron or steel. The construction is the same, however. The stem is meant to be inserted into a socket inside a furniture leg. The metal is a newer yellow-toned steel, and the wheels are riveted into place.
Each wooden wheel is 1 1/8 inches round. The stem is 1 1/2 inches long. The height of the caster from the stem base to the bottom of the wheel is 1 1/2 inches.
All the wheels are in very good condition.