People and Seating.
When you have determined how long your sofa needs to be, it’s time to move on to how many people you will need to seat at any one time. If you have a 95” sofa at the moment and you only have two cushions then there is a high chance that you won’t seat three people on it. If you can find a 100” sofa that has three seats however, then you can easily seat three people but the fit might be a bit cosy.
The easiest way for you to find the right depth for the sofa that you choose would be for you to sit on it. Make sure that you think logically when buying your sofa, do your feet touch the ground when you sit on it? A lot of sofas are around 36” deep but it is possible to find ones that go up to 40” deep. If you have a lot of kids then a shallower sofa may be better as it will stop their feet from dangling but if you’re an adult who likes to lean back then you may want a deeper sofa.
Colour is also another consideration, and for this, you need to think about how much natural light you have in your room, whether the light is going to fade the material and even if it matches in with the other decorations as well.