1/2" and 1/4" Aspen wood was used. The dividers have groves allowing them to slide in and out, thus making them re-arangable. Before building decide on what you want where and work the dividers accordingly. One has to take into consideration of the angles and slopes with closing the hatch. I like to have my spices up front for cooking, thus the spice colunm in the front on the the left side. Will post more pics later.