The Largo design is a vintage look that dates back to the Victorian time period. This genuine black porcelain knob is complemented with a lavishly decorated back plate that makes for an appealing piece of quality door hardware. The vintage design is paired with a tubular latch for trouble-free installation. Is available in Polished Brass, Antique Brass, and Oil Rubbed Bronze.The door knob measures 2 1/4 inches in diameter (approximate). While the back plate measures 8 1/4 inches tall with a 2 3/4 inch diameter. Latch case has a 7/8 inch diameter and a back plate measuring 2 1/4 inches tall with a one inch diameter.This style is available as a single sided dummy knob (1 fixed knob), double sided dummy knob (2 fixed knobs), functional passage (non-locking) and functional privacy (locking) sets. Functional door knobs come with a standard 2 3/8 inch back set, or you can request a 2 3/4 inch back set at no extra charge.