How Umbrellas Are Measured?
A Square (4 Rib) Umbrella Is Measured from Point C to Point D Along the Edge of the Panel. Example: a 5.5' Square (4 Rib) Would Measure Approximately 5.5' from...
A SQUARE (4 rib) umbrella is measured from point C to point D along the edge of the panel. Example: A 5.5' square (4 rib) would measure approximately 5.5' from point C to point D along the edge of the panel, making it a 5.5' umbrella, but measures 7.5' feet from point C to point E diagonally along the ribs.
How is parasol size measured?
When measuring the size of the canopy start from the tip of the rib up to the centre hub (on the exterior side, when the umbrella is closed) and multiply by 2. This is the arch diameter of your parasol, in case you have a round umbrella (hexagonal, or octagonal).
How big should a parasol be?
A good rule of thumb is to pick a parasol that extends over the edges of your table by around 2 feet. You should also consider the diameter of the pole, especially if you want to fit your parasol into a base.