Learn how to create this easy to make wagon cover in this sewing tutorial.
Since wagons come in many different sizes measure your wagon using this formula.
This is an example:
This wagon is 36 inches long, 18 inches wide and 5 inches in height.
X = length of wagon + (3 x height of wagon) = 36″ + (3 x 5″) = 51″
Y = width of wagon + 3 x height of wagon) = 18″ + (3 x 5″) = 33″