Oak Finial.
Wooden Clock, Curtain finial, Bedpost or Craft Finials. 
These Finials will stain up beautifully for you.
They are 5 inches high (not counting the mounting screw) 
They are 1 7/8 inches in diameter.
3/16 mounting screw. 3/4 inch long.
The base measures 1 3/8 inches in diameter.