I'm ready to smoke my first beef brisket and have a few questions. Earlier today I went to my local Walmart and saw 2 pieces of meat. The first is labeled "flat cut corned beef brisket" (it was square shaped and was about 2.34 lbs). The second piece was labeled, "Beef Brisket" and this one is about the length of a slab of baby back. Yesterday, I was at Costco and saw a small piece of beef which looked more like a skirt steak, it was only about 1/4 thick and is $19.00. and labeled "Beef Brisket" I'm confused as to why there are so many variations on beef brisket. I'm wondering if different places considers different cuts to be beef brisket. I was under the assumption that a brisket is more the size of a roast. Can someone kindly set me straight as to what I should be looking for. Thanks!