Domestic Long Hair isn't a breed. It's the label shelters and veterinarians use for a mixed-ancestry cat with a long coat, the fluffy counterpart of the Domestic Short Hair. These cats come in every color and pattern, from tabby and calico to tortoiseshell, smoke and solid black, and some look a lot like a Maine Coon or Persian without sharing that ancestry. Most adults weigh 8 to 12 pounds, though long fur can make them look larger.
With no breed standard, size, coat texture and personality vary from cat to cat, and many turn out affectionate and adaptable. What they share is a coat that needs regular brushing to prevent mats and hairballs, plus moderate to heavy shedding. Many live 12 to 18 years, so adopting one is a long commitment worth planning for.