The pattern comes in three sizes:
Baby Bear - which will accommodate bears up to 8" tall
Mummy Bear - with a maximum bear height of 10½" tall
Daddy Bear - catering for bears up to 13½" high.
If you have a super-sized bear that doesn't fit into any of these sizes then it's a pattern that is easily increased further on a copier at the local library or print shop.
The pattern will use up scraps and offcuts of material, but if you want to buy new fabrics then full quantities are given. Essentially though, three fat quarters of co-ordinating fabrics will be plenty.
Small businesses and independent online shops are welcome to sell any sleeping bags that they make from this pattern.
You can download the pattern and print it out at home straight away.
If you are making a sleeping bag for an oddly-shaped creature, you may wish to look at my blog post, 'Unwieldy Antlers and Other Sizing Issues', which will give you lots of advice around this subject. You can find it by searching for the word 'antlers' in the search field at the top of my blog.