Three important dimensions are all you need to find the right cover. Length by Width by Height (L x W x H) or in some cases, Length by Depth by Height (L x D x H)
Patio Table Cover or Table and Chair Covers
Note:
Be sure to push your chairs all the way in when measuring. Measure from the top of one chair to the opposite chair, then the other side. If a cover fits too big, then simply pull the chairs out slightly to make the cover fit tight.