This old set of casters is unique in that the wheels are brass. New sets of brass casters look nothing like these. The wheels are one inch round. The stem that inserts into the furniture leg is one inch long. The platform under the stem is 7/8 inch by 5/8 inch. The lift to the furniture after adding the casters will be about 1 1/4 inch. This set is old and the only set we have of this kind and size.