I don't think you'll find a standard that "requires" a small shop to do it, outside of a certification you are pursuing, but if you do a Google search for "ansi inspection room temperature" you'll get what's used industry-wide. You'll probably just want to decide what your shop wants to do and implement it. We go with 68° ± 3° for both our QC rooms, they have 1 CMM and 1 comparator in each. We have fewer than 60 employees.
Edit: I forgot to mention that our production facilities are climate controlled too, and that helps a lot.
Thanks - if the the shop is temperature controlled - yes ... good plan
if the shop is not temperature controlled - still a good plan
what matters in the verification and adjustment of equipment (Note: Calibration is a word that means something else for what happens in a small shop) is that the same temperature of the master match the temperature of the equipment.
They must be of the same temperature because of the expansion of metal.
Note: for Calibration lab - according to the Labs that qualifies NIST instruments - temperature is not an issue - as long as the temperature of the equipment (master) is the same as the instruments are calibrated.
I audit those labs and they are comfortable to walk in and according to the Physicist - temperature is not an issues if both (masters and instruments) are at the same temperature.