These are sold as 1 bone joint

If you would like a 2 or 3 bone joint just order 2 or 3 portion

standing rib roast, also known as prime rib, is a cut of beef from the primal rib, one of the nine primal cuts of beef. While the entire rib section comprises ribs six through 12, a standing rib roast may contain anywhere from two to seven ribs.