Sometimes a coffee table that isn’t the standard height or width is exactly what a room needs. In this instance a very low coffee table creates a crisp horizontal plane in the foreground offsetting the long horizontal line of the credenza in the background. A higher table would have blocked the view of the credenza and competed with it; the varying heights add interest.
Choose your fabric wisely since people may want to put up their feet (and shoes). Outdoor fabrics can be smart; steer clear of linen and fabrics with high amounts of rayon or viscose. Take a swatch home and test it out with dirt red wine or whatever you think your coffee table will encounter to make sure your fabric choice can handle it all. Keep an upholstered ottoman 18 inches from a sofa or chair so you can easily put up your feet and make sure the height is consistent with the surrounding seats.