I bought some wooden hearts, number stencils, a craft sponge and brown craft paint from Michaels.
After I finished sponging the numbers on the hearts, I let them dry. Then I took the hearts outside and sprayed them with Aleene's Spray Acrylic Sealer to protect them so that no moisture would ruin them. Once they were dry I had my dad drill two holes at the top and we tied twine through each hole and tied them on the table centerpieces.
Here is a table number hanging on one of the white iron centerpieces.
We also hung them from the mason jar centerpieces too.