The dimensions are liste on the product page:
http://www.mameroom.com/product_VirtualJukebox.aspThe cabinet kits are virtually the same as the step-by-step plans. There are only a few changes:
1) how the marquee and bezel plexiglas is attached.
2) There is also a vented rear panel with a cutout for an optional fan.
3) The rear of the cabinet is receseed 1/2". So if mounting on a wall, there will be a 1/2" gap between the cabinet and the wall allowing airflow in and out of the cabinet.