Mookie Betts, the MLB star most people mean when they say “Betts,” is listed at 5 feet 9 inches tall (about 175 cm).

If instead you meant UCLA basketball standout Lauren Betts, she is listed at 6 feet 7 inches tall (about 201 cm).

If you had a different Betts in mind (for example a specific league or team), tell me their first name or context and I can narrow it down.