Domestic Long Hair isn't a breed. It's the label used for a mixed-ancestry cat with a long coat, the fluffy counterpart of the Domestic Short Hair. These cats come from the general cat population, so they appear in every color and pattern, from tabby and calico to solid black, smoke and bicolor. Some resemble a Maine Coon or a Persian without sharing that ancestry.
Because there's no breed standard, size, coat texture and personality vary a lot from cat to cat. Adults usually weigh 8 to 15 pounds, though long fur can make them look bigger. What they share is a coat that needs regular brushing to prevent mats and hairballs. In Tallahassee, that coat pairs best with an indoor routine, air conditioning in summer and a cat whose personality you've gotten to know in person.