It’s about the size of a 1.5” three ring binder. Pretty compact for how useful it is, I used one as my main desk mixer for a while before going heavily multichannel, and it still easily fits in any of my bags along with my laptop, cables, and a stomp box or two. Big is relative, but for the channels and features this thing is pretty small. The killer feature is the mutes function as alternate sends too so they effectively become a second output bus with full submixing.