I used cedar deck boards and rails to make this chair - A little more costly, but definitely worth it!
The seat and back rest were made using 5/4 x 6" boards. I cut them 1/2" to 3/4" longer so that they would overhang the supports - for a more finished look. The 2x2 rails came with an angled cut, so I decided to use that to my advantage on the back supports - I made them a bit longer so they would sit higher on the back rest, and I think the angled cut looks a little more "friendly". All screws were left exposed, since this is an outdoor cedar chair.
The table in the photo is an original picnic table from the 1920's, complete with the original paint. It folds flat for storage. I hope to measure it someday and make a plan to build a reproduction - If that ever happens, I will post it on Ana's site.
Thanks Ana for the great plans!