It's pretty standard, I own one. If you can hand truck it up the stairs, lean it on it's back an rotate it to make the turn. I cut a moving blanket and put it under the back of the machine once I get it on the hand truck so I can slide it with the front facing the ceiling. Strong friends help...lol
Rough measurements with the head down facing the machine as if you were playing:
Width = 29" (this is the top of the backbox, the body is about 22.5")
Length = about 58" w/ the trigger ball launcher attached.
Height = 34" (25" body w/ 9" wide backbox folded down) This is probably a little less, because the widest part of the backbox is on the slope of the playfield cabinet when folded down.