Hi Chris. The main pole itself actually goes to the ring which is 73 1/4" outside dimension and the inside dimension is 72 1/4" to fit the 72" diameter sign. What you call wings flush with face of post is actually a sub-assembly that consist of two gussets that are 3 1/2" x 9 1/2". The end plate is 3 1/2" x 23 1/2" long. At one end it is bent at 3 1/2" which makes the very end of it 3 1/2" x 3 1/2". It is a separate piece welded on to the side of the main post.