Whichever part of the chicken the cutlet meat comes from, it is always sold boneless and skinless.
You can buy Chicken Cutlets in many states of preparation — raw, cooked, breaded, unbreaded, spiced, etc. The breaded ones are sometimes not one solid piece of meat, but rather several pieces or even mashed chicken squished together and then breaded so that it appears as one piece, making it more of a “preformed ground chicken pattie” that is being sold as a cutlet.
Many meat sellers use the phrase “Chicken Cutlets” and “Chicken Fillets” interchangeably — they often say “extra thick Chicken Cutlets”, when in fact what they are selling is unpounded Chicken Fillets, or simply Chicken Breasts.
Chicken Cutlets are used in making dishes such as Chicken Parmesan.