A Pergola is sized according to the size of the roof. Pergola size is not to be confused with the placement of your posts. Posts are typically recessed back 12 inches from the edge of the roof. For example, if you ordered a 18' L x 12' W Pergola, your Pergola's roof will be 18' x 12' while the outside 4 corners of your posts would be at 16' x 10' apart (and for the more technically minded - the on-center measurement would be 15' 6 1/2" x 9' 6 1/2").

Below are two sets of 3 drawings of a 10' x 16' Pergola showing how they can be oriented in either direction (as highlighted by two sets of drawings) at no extra cost.

If you do not see the exact roof Length and Width that you'd like, please choose the closest sizes offered (we do not charge for custom sizing - all pricing is based on the square footage of the Pergola Roof) and you can enter the exact size in the comment section. Please note the outer edges of the posts are normally recessed back 12 inches from the edge of the Roof. This overhang can also be adjusted to meet your needs.

16' Length x 10' Arc Width 10' Length x 16' Arc Width

16' L x 10' W

10' L x 16' W