Sod BnQ Mr G, i had all my wood cut to size and delivered saved me alot of faffing about. My cab is 110cm high 90cm wide and depth of 90cm as well. This is purely for clone grows, for seed grows i would have made it a bit bigger but i have 3 other cabs i use and i just dont have the space for a bigger cab. Im going to have two of these cabs but one sitting on top of the other as i have space to go up but not for a long cab, each cab will have one 600w using a air cooled hood, the plan is 20 clones in 4.5ltr pots and aim for an oz per plant. The doors are 90cmx40cm in white and the cheapo end of the range but they are perfect for what i need. If you dont fancy lugging wood and waiting on the BnQ staff to get their arse in gear try these guys, ofcourse that depends on where you live but there are plenty of places to get your wood.
http://www.mdfcuttosize.com/MDF-Wood.php