I made this for an exacto set I purchased that didn't come with a cover. The original measurements for the lower case are: 39.9mm x 129.5mm x 10.8mm. This is designed to slide over the top so I don't lose any of the blades in the set. I printed this in transparent PETG, but it obviously is fairly opaque. I didn't take the time to heat it for clarity, but may do that if I print it in ABS along with a new base.