Coffee tables should be around 40 to 45cm in height. This is to match the height of your couch seat cushions, which are often around this size. If your couch is taller, you’ll require a higher coffee table, and if it’s shorter, find an equivalent height coffee table. A coffee table that doesn’t match the height of your sofa cushions won’t be comfortable to rest your feet on, nor to place your drinks on. If you’re indifferent about these functions, you’ll have a greater variety of tables to choose from.