Height, age, measurements or a strong feature can matter for some briefs, but one number does not tell you what you “can be”. Start by asking a more useful question: what kind of work is actually being produced, and what do agencies in that lane represent?
Commercial and e-commerce work often ask for a different kind of usefulness than runway. Hand/parts work needs specific close-up material. Fit modeling is about matching target measurements closely enough for a brand to test garments. Mature and petite are profile categories that may intersect with commercial, editorial or e-commerce work rather than replacing them.
Use the specialty guides to understand the deliverables, then compare real agency rosters and application pages. The label comes last.