Thimble Slide: Fleur De Lis, 1-inch Brass Guitar Slide, Handcrafted in U.S.A. - Size M 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, handmade in the U.S.A. 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 Small or Medium. Sizing Chart At: www.ThimbleSlide.com; Medium fits fingertips 9/16 - 10/16 inch in diameter aprx. measured in the middle of the nail.