Pro Series Brannock Device Metal The Brannock Pro Series lets you measure even the largest feet - from men's sizes (US) 10 to 25, for feet larger than size 16. Very solid, high-quality, durable. Made of metal. Made in USA. Reject if device you receive is not Genuine Brannock brand. The Pro Series Brannock device is quite a bit larger than the Mens or Athletic devices.