-wood for shelves (I used 1/4" thick red oak planks, backed with 1/4 - 1/2" thick red oak for support)
-wood for cross bars (I used 1/2"x1.5" red oak)
-shelf brackets (< 1.5", to support cross bars, need 8)
-shelf braces (look for 'mending plates' - straight brackets to support cross bars, need 8)
-wood finish (I used 50/50 tung oil/mineral spirits)
-1/2" - 5/8" wood screws
Not having a table saw or planer, I used craft wood that has already been (mostly) squared and nicely planed. I chose oak. This project could be built for much less $$ if you have the ability to cut and plane your own boards!