Rib roast is available either with bones in, called standing rib roast, or boneless, called rolled rib roast.
Small End Rib Roast
Cut from the part of the ribs closest to the loin, this is the most tender half of the rib roast.
Large End Rib Roast
Cut from the part of the ribs closest to the chuck, the large-end roast is slightly less tender than the small end roast.
This is a boneless roast cut from a single muscle, the rib-eye muscle. Well-marbled and tender, it is also known as a Delmonico roast, after the New York restaurant that popularized this cut in the mid 1800s.