Smaller then the Mac Mini (Yeah Yeah, Due to external power brick), you'll need your own hdd (ssd) and ram, but they go on sale a good amount on slick deals and fat wallet. Well, compared to the amount of sales Apple gives (None) I mean lets be honest, it's far cheaper to get your own ssd and ram, and nowadays, with ssds dirt cheap, you can get a much better one then the one Apple uses. Just looking real quick, Fry's B&m has this NUC for $299: http://slickdeals.net/f/7256564-intel-nuc-boxd54250wykh1-barebone-299-w-promo-code-fry-s-b-m?v=1 It compares pretty well to the lowest price Mac Mini. You need your own SSD, but you kinda need to buy one anyway for the mac Mini. And you need ram, which has been pretty cheap for awhile.