Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:5096245.
This is a wide, shallow wall hook, designed to mount items with built in handles. The width is 60mm, it stands 12mm proud of the surface and it would suit handles of about 5-8mm thickness. It has a sloping internal surface, which is intended to pull the item you are hanging flush against the wall, and also makes it easy to print without supports.
The countersunk mounting holes are 40mm apart with 4mm diameter to suit number 6 countersunk screws.
The screwholes have recesses at the rear to ensure that this hook will mount flush to the wall even if you are using wall plugs which aren't completely flush with the surface (as is typical with "hollow wall" plugs in particular).