This past Halloween, a little Shih-Tzu named Munchkin dressed up as a walking teddy bear, a costume that her human Cindy Roth made especially for her.
Measure your dog in the front from feet to top of head (Munchkin is 14″). Buy a teddy bear in similar color to your dog in their size (I got hers on Amazon for $30). Cut the face off, cut the bottom of the feet off, cut open the back. Take all the stuffing out except for the arms. Bear only goes on front part of their body/legs and back half is exposed. Put a string or velcro through the back behind the neck to tie/close. The bear’s arms hung down, so I sewed them up a bit higher so they stuck out to sides more instead of hanging down. Took me maybe 15 minutes to make!