D'Andrea Thimble Slides Thimble Slides 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; the Maxim maximizes Thimble Slide functionality and comfort. Slide Surface: 1-inch, 2.5 cm, 3 strings; Made In U.S.A. Sizing Gap 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 9.5/16 - 10.5/16 inch in diameter aprx. measured in the middle of the nail.