Scale is vital in all design but even more so when it come to the dining area.  The first thing you have to remember is that outside furniture is usually significantly larger, therefore you will need a much larger outdoor space than you would if you were planning the same space indoors.

The other major area of importance is circulation space.  i.e. the area around the perimeter of the table for people to move, serve food or pull their chairs out when leaving the table. Unlike interior spaces where people are prepared to squeeze behind chairs to enter or exit, outside you need at least 1m (3ft) behind the chairs to comfortable accommodate pedestrian flow.

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