These saddles were a nearly perfect fit for a Martin HD-35. I would actually prefer to need to sand the width down to get the exact fit I want. But it might have come out to that thickness anyway. As it was I only needed to sand the bottom to get the height I wanted. Even the radius was right for the fret board. If the saddle slot was any wider, this would have been too thin. Be sure to measure your old saddle before ordering this just in case.The bone is nice and dense and uniform. You can hear a nice bright sound when dropped on a solid surface. It is stiffer than Tusq and easy to sand.