Always Measure Before You Buy
This falls under the same umbrella of "creating a design scheme before you search for furniture." If you just buy things for your space that you don't know will work or not, then you might be baiting yourself into making a massive mistake. If you can't fit a couch through your door, you can't own that couch anymore...
Think it Through Bruv
Instead of taking shots in the dark, you should measure your space first, then consult your furniture store (whenever you decide to purchase your 'sittables' from) based on your measurements. Narrowing down the search will be imperative when your final result comes through. Like we said earlier, if you can't fit your couch through your door, that's not your couch anymore.