We have a lot of 4 vintage/antique casters. 3 are a set and the 4th is a single. The wheels on the set measure about 1" in W x about 5/8" across the center of just the wood. There is the steel attachment to them which is rusted. This attachment measures about 1 1/2" on the upright pin. The full length from the bottom of the caster to the top of the pin is about 3 1/8". 2 of the 3 roll nicely the 3rd one sticks a bit. The single one is about 1 1/8" across the wheel center x 5/8" with the pin being 1 5/8" on the upright pin and the full length is about 3 1/8". They are very close to the same size - the metal support is slightly different on the single. The single one sticks a bit as well.
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