If you wish to add a design with embroidery thread or buttons, do that before you sew the front to the back. The felted material is too thick to work comfortably from inside the sock. The decision was made to change the decoration from a Christmas tree made from buttons to something else. The something else turned out to be a patch pocket, made from a piece of the sweater cuff.
But lets start with a loop.
Finish the top edge in a blanket stitch. Add the name to the button tops and fill the little pocket. This will be handy for a love note, candy, a little cash or a gift card.......
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