When deciding whether a sofa will fit you first need to look at the minimum access width. This dimension will be displayed on the product detail page and tells you how wide your doorways and corridors need to be.
You then need to look at the length of the sofa if you have any right angle turns, awkward staircases, or lifts to access your property. The reason for this is that the sofa will need to be carried on its end to negotiate these obstacles so you need to check you have enough height clearance.
It is also worth pointing out that if you do have a right angle turn then the sofa needs to be able lean far enough back to be able to get it through the doorway.