Dp and I don't have stockings but the kids do. I usually buy myself something and wrap it and say it's from Santa. Dp birthday is on Christmas day so I write merry birthday Even though he will get birthday presents later.
The kids get the usual clothes in the stocking too and just a heap of little things that will get used like, bath bombs, bubble blowers etc.
The clothes just gives them something else to unwrap which I'm sure is my kids favourite thing!