Rebar Diameter Chart. Rebar size chart imperial bar size metric bar size (soft) linear mass density nominal diameter nominal area lb ⁄ ft kg ⁄ m (in) (mm) (in²) (mm²) #2: 20’, 30’, 40’ and 60’;

Check out the comparison charts we’ve made! Reinforcing steel is used widely in construction. Each imperial bar diameter increases by 1/8 inch.