Measure the gap between the short leg and the floor. Next, drill a pilot hole and insert a glide in the three non-problem legs. "Use washers to shim the last one," Dvorak says.

A BIZARRE optical illusion shows six women sitting on a sofa but only five pairs of legs are on display. The image, which shows a group of pals sitting in a bar, has left Redditors baffled.

That is exactly what artist Jacob Tonski did for a recent installation that involved balancing a 19th century sofa upright on one leg. The result is Inception-like wonderment.

If your old sofa needs a pick-me-up, we know how you feel—here are our favorite easy fixes for sagging cushions, dated fabrics, and dinged-up legs.

Watch A 170-Year-Old Sofa Balance On One Leg Optical illusion? Not a chance. This antique sofa has been loaded with satellite guts to stay eerily on point, though it has fallen more than once.