I started by taking a sock and roughly tracing around the top of it. I was going to make it smaller than what I traced, but I remembered that socks stretch. That’s right socks stretch so I made it full size. Four pieces exactly the same are needed to make two inserts.
When the edges are done turn the whole thing right side out. Then sew down the middle. This will keep the contents from shifting too much or bunching up.
Put a spoonful of rice in each side, then sew across horizontally. I picked out about four stitches to create a way for rice to move in between the top and the bottom. Then once your horizontal line is sewn, put in another spoonful of rice in each side.
Now the top must be hemmed up. Turn the edges over and hem the straight edge up, taking care not to let rice be sewn into the hem.
I just stuffed mine down inside a pair of socks I was wearing.
Now my toes are warm!