Gridfinity flat caliper holder

Designed to fit an Ikea galant desk locker's top drawer, which is very shallow.

25 mm high and 5x2 Gridfinity units.

Place to put spare LR44 batteries, but I suggest you hack it so the cover becomes a sliding on-off switch and save batteries: https://www.instructables.com/Digital-Caliper-Battery-Cover-Switch/

Also in the photo is a design for a cheap amazon multi-bit screwdriver.