Look for an extra-large men's t-shirt, preferably clean. Measure and mark several inches from the edge
(my first bandwidth was 6").
|Single band--25" from side to side|
|Here are three bands and an additional smaller band made from the sleeve of the shirt.|
Of course, these bands don't stretch as uniformly as commercially-made products and I think you'd have to hunt around to find t-shirts with different stretch resistance, but it does provide decent resistance when exercising the arms and hands. Let's see how it works this year.