A 21 yard dumpster is commonly used for medium-sized to large projects or renovations, such as home renovations, commercial construction projects, roofing projects, and major cleanouts. It typically measures approximately 14 feet long, 7 feet wide, and 6 feet tall, with a volume capacity of 21 cubic yards.

A 21 yard dumpster is suitable for various types of waste, including household debris, construction and demolition debris, yard waste, and general trash, and can hold approximately 5-7 pickup truck loads of debris, depending on the type and density of the waste.