Basement Cleanout gets its own page for a reason worth weighing before you call: it is a basement clearance, where damp history matters more than the volume on the floor. You'll want to know this before the truck shows up: damp cardboard, carpet and upholstery weigh a multiple of their dry equivalent.
Two limits apply at once: how much room you have, and how much weight you're allowed to put in it. Debris rarely respects both at the same time. Homeowners are the ones most often standing at this decision point, weighing options up to 15 or 20 yards. The booking is short once you know the weight of the load and the length of time you need the container on-site.
What comes out of a cleanout like this is anyone's guess until it happens, which makes overordering by one size cheaper than betting on a second delivery. Weekend and holiday pickup isn't universal -- ask directly if the project timeline runs through one, rather than assuming the schedule matches a weekday drop-off. The container you rent is a bet on the pile you haven't finished making yet. Bet close to the real number.