Chuka slot is 115 and that sugimoto is around 110. For the rest, slot is 55, and I could only get my Shig which is 54 in, but not Kato, nor Noborikoi Toyama which are a bit taller. However, for slighty thicker and taller knifes, it is easy to enlarge the entry to accommodate using file, chisel, osculating saw, or what you have at hand suitable for the task.