If you're a sewing diva, you can buy a pattern for a Santa suit and sew your own, but by the time you buy all the fabric you'll probably spend as much as you would on a store-bought costume.
A wide belt can be a hard find in the men's department, so feel free to check the women's accessories section of local department stores if you plan on piecing together your Santa suit.
While recreating a Santa suit from bits and parts can be done, you may find purchasing a suit is the best option.
In addition, once you have your Santa suit in all of its' jolly splendor, be sure to keep it packed away safely from curious children.
He's ugly, bitter, green and hard to miss, especially when he dons his Santa suit.