If you're comparing Remodeling Debris Removal to a standard container job, stop — it is a steady mixed stream from one room at a time rather than a single demolition surge, a different decision entirely. This is the detail that separates a fair quote from a surprise invoice: tile, plaster and mortar are far denser than the cabinetry and drywall they arrive with.
The yardage on the container tells you the size of the box. It says nothing about how much of that box you're allowed to fill with something heavy. If homeowners and remodelers sounds like you, expect to size somewhere in the 15 or 20 yard range — that's where most bookings like yours settle. The booking is short once you know the weight of the load and the length of time you need the container on-site.
Household junk runs light in some corners and heavy in others, which usually balances out, so the container size tracks the size of the job rather than any one material. Rescheduling a delivery date usually costs nothing with enough notice; canceling the morning of a scheduled drop-off often does not. Ask where that line falls. You're not choosing a size so much as choosing how much you trust your own estimate of the load.