1000 Yard SuperAdobe RollEco Dome uses approximately 2000 yards of 3 different widths 14 inch width: good for any dome up to 12 foot, all landscaping 16 inch width: Domes up to 14 foot (Eco Dome Apses use 16 bag), all landscaping 18 inch width: Domes up to 16 foot (Eco Dome central dome uses 18 bag), thicker retaining walls benches 20 inch width: Domes up to 18 foot, Vault Walls, thicker retaining walls benches. *Only available in 1,000 yard size