How big is the box for Rockband?

there is this huge boxed prez under my christmas tree. i asked for a ps3 and i hacked into my moms amazon account and saw i got one. i want to know if this big huge box is the rockband video game deluxe package (guitar,drums,mic,game). i need the measurements for this package to see what it is. give the answer before christmas. thanks a have a fantastic day.