Second Quality - Wood Jumbo Knob with a Recessed Base

Sold individually, two are shown in the picture so you can see the tops and bottoms.  
Dimensions:  2-1/2" Diameter x 2-9/32" Tall. The recess at the bottom measures at 2-7/32" wide x 9/32" deep. This will vary slightly. 
There is a shallow 1/8" pilot hole in the center of the bottom. Made in Maine.  Please note that this is a Second Quality item, may have 
minor roughness and other flaws.  Hardwood Maple. Made in Maine, USA.