Measurements are working data. Agencies, casting teams and brands use them to understand sizing, prepare garments and compare a profile with a specific brief. They are not a score and they do not, by themselves, decide whether someone can work as a model.
Keep the record current and use the units requested by the organization. Height, chest or bust, waist, hips, shoe size and other fields may be requested, but the exact list changes with the job. Fit modeling can require a much more detailed target set than a standard agency application.
When a measurement changes, update it. A precise ordinary number is more useful than an “ideal” number that is no longer true.