Can anyone tell me if there is a certain doorway width that furniture manufacturers design their sofas to fit through?

I have a standard 36" wide front door. I intend to order an H&M sofa from Lex Furniture; however, among their delivery caveats, Lex says no returns if the sofa doesn't fit through your door.

Even though I plan to order a smaller-scale sofa in an apartment size, it's still a few inches deeper (38"-39") than my current sofa and a bit taller too. I would be one unhappy camper if I was left with a sofa on my front walk because it couldn't fit through the largest door in my house!

Thanks!