Big ?

oh yeah i exagerated a bit lol... i can also use plywood for the top i think it will be easier to work with, idk.

 

maybe marine grade ply wood

 

well im gona carpet it so it ill looks good and that probably hels get some moisture out but before the carpet ill probably give it a coating of waterproofing wood sealer incase it gets wet or something gets spilled on it

 

is it better to cut the wood with a router than with a jigsaw??