2 7/8″ high x 2 1/16″ wide. Brass body. Brass shackle. “BARNES MFG. CO.” is stamped on the obverse of the shackle. “PAT’D JUNE 24, 1879” is stamped on the reverse of the shackle. “BELLAMY’S PAT. JUNE 24 79” is stamped on the shackle of earlier locks.Patent # D11256.