Moving house
Check whether furniture will fit through the doorway
Whether a piece fits depends on the whole route into the room. You need the furniture's height, width and depth, plus every door, hallway, stair turn and ceiling along the way. Even with good numbers, the answer is an estimate you'll need to confirm in person.
A text to start with
I want to know if my sofa will make it into the back bedroom. The sofa is [length] long, [depth] deep and [height] tall, and the arms don't come off. The front door opening is [width], the hallway is [width] wide, and there's a 90 degree turn into the bedroom door, which is [width] with [space] of hall in front of it. What angles could work, and which measurement am I missing?
Example request. Change the details to fit your situation.Where fit estimates go wrong
A reply that compares two numbers and declares the sofa fits is too confident. Turns are where furniture gets stuck, so the answer should account for diagonal depth, how much hallway sits beside each door, and whether the piece can be tilted on end. Door openings shrink when hinges, trim or a door stop get in the way. The reply should list any measurement it assumed, such as ceiling height at a stairwell. If it says "likely fits," measure the tightest point yourself and ask what could come off to help, like legs or the door itself.
Confirm the tightest point
Remeasure the narrowest spot with someone holding the other end of the tape, and include the door stop and the hinge side. If it's still close, cut a cardboard outline of the piece's narrowest profile and walk it through the route. Tell your movers what you find so they can bring the right tools or plan another entry.