If you're buying one online and won't be viewing the product until you receive it, ensure that you measure your space accurately before you make a final decision. By rule of thumb, it should be the same height as your sofa cushions. You should also aim for a length that is equal to three-quarters of the length of your main seating item so that there is enough space available for guests to walk around the area comfortably. Choose something that suits the style of your existing aesthetic in a timeless design.