Harmonica Key Labels - 28 Count Deluxe Contains 28 deluxe harmonica key labels. Raised labels, not just a sticker. Easy to use, simply peel and stick. Fits perfectly on most harmonica combs. Each labels measures approximately 0.5 x 0.31 inches Easily find the key of your harmonica by placing our labels on the back. Includes labels for your "low" keys and "PB" for all of our Brendan Power's PowerBending tuning fans!