The bottom 1x6 piece was cut at 36 1/2" and the 1x3" pieces at 16" to fit flush with the two 16" drawer slides. The section of 2x4 will change depending on the drawer slides you purchase. Once the saw is lined up and you have everything together clamp and level the arrow and drill a 1/4" hole about 1/8" deep for the nock to sit into the 2x4. Hope this helps you guys. Dont forget to find the 20% off coupon before purchasing from Harbor Freight!