Economy Chips are wood chips that come from local tree service companies. We have no control over the consistency and quality of these chips. They are mostly a square chip, but mixed throughout you could find larger sticks, leaves, and maybe even the occasional Gatorade bottle, trash or log! ? They work well for inexpensive ground cover and weed control. Like the wood chips, they will last for many years. 300 – 400 lbs. per yard.