Changing hook size and yarn changes the appearance and size of the teddy bear.

Baby Wonder 8 ply makes a 9 inch bear
Teddy Go Handmade makes a 16 inch bear
Mondial Coccola makes a 20 inch bear

The bear is crochet in single crochet and has 1 main piece (body and head) and then has the muzzle, ears, arms, legs and tail sewn on.