Costco's St. Louis-style pork spare ribs are a butcher-trimmed cut sourced from the belly side of the pig, offering a flavorful and meaty rack ideal for smoking, grilling, or oven roasting. Unlike baby back ribs, spare ribs are larger, fattier, and known for their rich pork flavor and tender texture when slow-cooked.

The "brisket bone removed" designation means the hard sternum cartilage (brisket bone) has been cut away, leaving a uniform rectangular rack that is easier to cook evenly and present at the table. This trimming process is what defines the St. Louis style — a USDA-recognized cut that produces consistent results for backyard cooks and competition pitmasters alike. Sold by the pound, these racks are typically 2.5 to 3.5 lbs each and are available fresh at the meat counter.