http://www.avsforum.com/avs-vb/showthread.php?t=818646There's a pretty clear image of it. I have a modified slikstik classic blank sitting around, gotta warn you, these things are *really* big. The classic is very similiar to the quad except the quad is longer and has a different arc cut for the top part. Mine has the trackball, spinner, dedicated joystick, asteroids buttons and all.
The classic measures in at...
17" width at it's maximum
~44" in length
with depth ranging from 4 3/4"(front) to 5 1/2"(rear)
You'd need to add width to hit 4 players, but the rest of the measurements will work. I've gotta ask though, are you really sure you want this? I ended up decided the thing was way too big to be used, felt like I was trying to play games from the other side of the room. I suppose it would be workable in some sort of sitdown design, but for anything else it's just way too big. At nearly 4 feed long, you've got people sitting almost 2 feet away from center, it's really awkward.