3/4" button plug, mushroom plug set of 12
A set of 12 3/4" button plugs. They are made from birch. Use them to cover screw holes or paint them to look like something. They measure about 7/8" across the top, 3/4" across the bottom, and 7/16" tall. They would fill a 3/4" screw hole.
The last photograph shows the 5 size plugs in my shop. This is the last one on the right.