Slide When You Want, Fret When You Need; the Thimble Slide allows your slide finger to still fret the strings! * An innovation in guitar slides by Cole Coleman * Slide Surface: 1-inch, 2.5 cm, 3 strings * Sizing Gap on it"s side allows custom fit within it"s size range * Made Of Brass in sizes S, M, L, XL; Sizing Chart At: www.ThimbleSlide.com; Medium fits fingertips 9/16 - 9.75/16 in diameter measured in the middle of the nail.