Interview with a Swiss Guard:
https://web.archive.org/web/20150208210605/http://www.themosttraveled.com/new/guard.html
Q: How many Guards are there?
A: Only 110 – the Commandant, four other officers, a priest, six sergeants, one staff sergeant, ten corporals, ten vice corporals, and the rest are hellebardiers like me. There is a separate Vatican police force.