The 1:12 Scale Knobs are handmade by my 14 year old son on his wood lathe.  They come assorted with various coloring.  These are raw wood and you can stain or paint them any color you want.  the picture does not do them justice.  The metal ones are also handmade and can be used in any application where a knob is needed. can also be used as tap handles.  These are both approximately 3/16 wide and about the same in depth.  The wooden ones have an end on them that can be inserted in a 1/16" hole in any door and be pushed in flush as a doorknob is, or the tail can be trimmed of flush and be glued on.