The question with Demolition Debris Removal isn't the size of the container. It's this: Demolition Debris Removal is structural material coming down faster than any other phase of a job produces it, and that's what most people miss going in. Settle this before you compare prices: older structures need testing before demolition, because contaminated debris cannot be containerised.
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. Ask around and you'll find demolition and general contractors renting for this more than anyone else, choosing from containers as large as 30 or 40 yards. What's in the load and how long it stays are the only two variables that move the number.
This is a renovation load: lumber and drywall by volume, tile and old fixtures by weight, and the two pull the sizing decision in opposite directions. Ask whether the quote already accounts for the delivery address, or whether it's a base rate that changes once the drive distance gets factored in. Order the size you can defend, not the size that feels safe. That's the decision in front of you.