DMT 4" Diamond Whetstone with Leather Sheath ORMD the #835 is sized in

the #835 is sized in between the smaller Illinois #206 Razor Strop and the larger Illinois #127 Razor Strop

You're particular about the grits of the water stones that you use for specific sharpening operations

Seeing the Double-Time Flattening Stone next to other popular flattening stones shows the size difference

#11 on Parts Diagram in Manual

DMT 4" Diamond Whetstone with Leather Sheath ORMD the #835 is sized in4" Diamond Whetstone sharpener is a convenient pocket model. Comes with a protective leather sheath for easy access to a variety of sharpening, honing or filing needs. Stone measures 4 1 3" x 7 8" x 3 16". Made in the USA. Choose from four grits: Extra Extra Coarse (120 micron 120 mesh) for extreme repair of a very damaged edge. Extra Coarse (60 micron 220 mesh) to fix and restore a damaged edge. Coarse diamond (45 micron 325) to quickly restore a