Buying a sofa can be a challenge, especially online. From size to material to style, there are a lot of variables that go into choosing the best sofa for your home. When it comes to the size of your couch, things can get very complicated. Not only does it need to fit within your living space, but it also has to fit through your doorway and up any stairs. In this sofa buying guide, we’ll show you how to measure a sofa to make sure it's the right size. We’ll also help you assess your lifestyle needs to find the best couch.