Our stocking stuffers are little goodies, nothing big. I get some candies and sweets, little hand puzzles, card games, I put wallets in the stocking this year, goofy things like a tooth brush, small books, etc. Just a mish mosh of little fun things with nothing being expensive.
My Aunt/Uncle and Cousins have what they call a 'stocking' gift. Their stockings are large gifts. That's where a piece of jewelry would possibly be tucked in or a watch or a card telling them that the electronic they wanted is in the closet. That is their main gift, whatever is in the stocking. They always say "this year my stocking gift was . . ." and my kids are like "I got a large size Hershey's kiss". :>)