When a grocery store or meat-packer hands you a "brisket," they're usually giving you a whole packer brisket, the entire pectoral muscle of a beef carcass, split in half by a natural seam of connective tissue. Think of it as two cousins living under one roof:
The Flat (or "first cut"): 4–8 lb, rectangular, uniform thickness (2–3 inches), smooth surface with a thin, even fat cap (1/4–1/2 inch) on one side and a lean interior.
The Point (or "second cut"): 3–6 lb, triangular, thicker toward the "point," irregular shape with heavy marbling and a thick "deckle" of fat running through the middle.
Together they weigh roughly 12–14 lb. The seam between them is a tough, sinewy strip of connective tissue called the silverskin or fat seam.



