What’s the Difference Between Baby Back Ribs and Spare Ribs? | Eater
"The chain's menu-item labeled as “riblets” are actually button ribs, not true ribs; they come from a long, thin cut that runs along the spine just after the rearmost rib. That piece is roughly 6 inches long, 1½ inches wide and about ¼ inch thick, and contains no full ribs—only small round “button” bones and thin meat, more like nubs to gnaw on than a conventional rack of ribs." - Brette Warshaw
