Usually, a business isn't just structured around a single art form. Within each craft, there a plenty of subsets and trends that dictate what products you can produce. Remember, this isn't an exhaustive list - don't be afraid to make the art form your own! Below are some examples of the more specific crafts that you can make a sell.
Keep in mind that certain sectors may pair well together in a product line. Cold weather gear like hats, scarves, and mittens make sense to sell along with blankets because they're all supposed to keep your warm. If you really want to combine two or more different sectors, remember to keep a theme.
Amigurumi
Clothes / Fashion Accessories
Cold Weather Gear / Accessories
Blankets
The principle of keeping a theme goes for knitting, as well. Remember to keep a consistent theme.
Blankets
Sweaters
Cold Weather Gear / Accessories
Quilting is one art form that is undergoing a major transformation. Gone are the days of quilting only being used to make blankets. Using classic techniques to make contemporary items brings an innovative vibe to your product line.
Hoop Art
Decorative Tea Towels
Clothes Detailing
Word Art