A product can fit the rectangle shown in a listing and still be impossible to deliver, open, connect, ventilate, or use. Measure the complete product experience before comparing features.
Define the usable boundaries
Measure the narrowest width, depth, and height after accounting for trim, baseboards, hinges, outlets, pipes, sloped walls, handles, and anything else that permanently occupies the space. Record hard limits instead of rounding up.
Add the operating envelope
Picture the product fully in use. Include doors, drawers, lids, chairs, hoses, cords, airflow and the space a person needs to reach controls, load items, clean surfaces, and remove the product later.
Measure the path
Check entrances, stairs, elevators, hallway turns, door openings and cabinet frames. A product that fits its destination may still fail to reach it. Consider the orientation needed at every narrow turn.
Keep a measurement record
Save a photo or sketch with the verified dimensions and note whether they describe the product, opening, operating position, or delivery path. Compare every listing against the same record so inconsistent dimension order does not create a false fit.