Wheel diameter is 8", wheel width is 2". Height from top to bottom is 10 (see photo measurements). SET of (4) CASTER CONCEPTS 8" x 2" HEAVY DUTY CASTER WHEELS POLY ON STEEL TIRE LOCKING SWIVEL 2 wheels are swivel with locking arm, and the other two do not have the swivel/locking option. Wheel diameter is 8", wheel width is 2" Height from top to bottom is 10 (see photo measurements).