Dimensions for the standard safety razor handle designs. All razor handles are internally threaded M5 x 0.8mm to a minimum usable depth of 0.400"/10mm. Handles will also fit vintage razor heads which are often threaded #10-32 as the M5 spec is just slightly larger.
The diameter of the handle on the end where the threads are is either 0.310"/7.87mm or 0.365"/9.27mm and depends on the model and date of manufacture.
Models (from left to right):
1)Maze, Hammered, Twin Helix
2)Bishop, Bishop Variant, Anchor, Florian
5)Torpedo, Torpedo Series 2