I am fortunate enough to live about an hour away from Pittsburgh, and to avail myself of Isaly's chopped from every deli in Morgantown.
Isaly's Chopped ham is one of the socially acceptable preformed ham products. People will not make fun of you for savoring it.(Well, maybe Hoffmudgeon
It starts out as a large rectangle(much like boiled ham or Polish Hams) It's consistency is very similar to the aforementioned hams, with more marbleing, not as in grissle or stringy fat, but a smooth mosaic. It's color varies from a light baby pink, deepening to a cameo rose color , further enhancing the mosaic effect. The ideal slice is equal to the thickness of Parma prosciutto, micro-thin and almost transparent. Being processed, this causes the meat to often clump into small , tender lumps. It is perfectly correct to have it sliced in any thickness you desire, from the microthin to a thicker slab-style.
Isaly's also sells a selection of several other more traditional hams. Another popular item is the Isaly's BBQ Sauce in hot and mild. It is a ketchupy type sauce that's fairly thin and bears a much stronger resemblance to sloppy joe sauce than any BBQ sauce I've ever made or tasted. It's most common use is to simply toss some Isaly's chopped ham into a skillet and heat.( I like to slightly brown the edges of the ham. Pour sauce over the heated ham, simmer a couple minutes and serve over Sunbeam hamburger buns.(Sunbeam if you want to stick to tradition.)
Isaly's was also the perennial stop that every child's school bus trip to P'burgh culminated in.
Be warned: there are several brands(such as BAR S) that attempt to copycat Isaly's. Accept no substitutions. Like Taylor Pork Roll, and Seltzer's Sweet Lebanon Bologna, other Pennsylvania regional favorites, it's the king of the Kingdom.