You are looking at a lot of four antique wooden radio knobs as shown. I'm not sure exactly what radio they came from. Three of them match and the fourth is a little different. 

The three matching knobs each measure about 0.75" tall (the distance they would stick out from the radio) and 1" in diameter across the tops. The other knob measures about the same, but has a slightly different shape and a smaller diameter at the base where it attached to the radio.  All of the knobs are in very good condition with only light wear.