Portion planning depends heavily on whether you choose a bone-in or boneless cut:
Add an extra 1/4 pound per person to your calculation if you want enough for sandwiches the next day. 2. Estimating by Rib Count how to buy prime rib size
Plan for 0.5 to 0.75 pounds (8–12 oz) per person . Since there is no waste, you need less total weight to feed the same number of guests. Portion planning depends heavily on whether you choose
Includes ribs 10–12. This end is leaner, more uniform in shape, and easier to carve. It is often preferred by those who want a "cleaner" looking slice. Since there is no waste, you need less
Note: For large groups over 14 people, experts from YouTube recommend buying two uniform-sized roasts (e.g., two 5-bone roasts) rather than one massive one to ensure they cook evenly.
My Honest Review of Costco’s Prime Rib (Types, Cost & More)