how to measure a patio umbrella canopy
Measuring a round umbrella canopy. Your umbrella will have 6, 8 or 12 ribs. 8-panel umbrellas are the most common. You will need to open your umbrella so the cover is taut. â¢ Then, measure B, from tip to the very center of the upper hub - this is the point where the finial is fastened through the cover. â¢ Measure the small opening C - this is often just a brass grommet, but it could be as large as 2 to 3 inches.