Lamp finials add a decorative flair to the top of a lamp, while holding a lampshade in place Lamp finials are threaded 1/4-27 to fit standard lamp harps. Finial measures 3/4" wide x 2 1/2" tall. Easy to Install, Screws onto the lamp harp after installing the lamp shade Antique brass decorative metal lamp part shade finial of a OWL that measures 1" wide x 3" tall. It has standard threaded finial hole (1/4-27) that works with standard harp (lamp bracket).Please note- this will only work with a lamp shade harp (bracket)- if you need this to work with lamp pipe (standard 3/8" outside diameter) then you will need to buy a reducer. Like Amazon item #B07D7H2P76.