We all love our electric knife, but after years of using the included thin plastic sheath it gets pretty busted up, so this is a replacement. 200mm x 25mm x 8mm with 2mm walls leaves the internal space at 21mm x 4mm and that post on the blade that hold the two haves together really need that 4mm on mine.  Printed in PLA, with Brim and No Supports.  Very simple model, keeps your blade and fingers protected.