These chrome-plated screened resonator sound hole inserts make a great addition to all sorts of instruments, and look absolutely great on cigar box guitars! Originally intended for resonator-style guitars, you'll find they can spruce up many other types of acoustic instruments as well. These pieces have a 2 3/8" outside diameter and fit in a 1 7/8" hole. The flange depth (the part that goes in the hole) is about 3/16". We also carry this same style in gold and black!