I don't think it's going to be very big.
It'll maybe be 6-8" long and about 4-6" wide. It's hard to tell at the moment, all on the racks as it is. It's about the length of a 1/72 Spitfire, though, I'd guess, with the wingspan of a 1/144 Mig 1.44.
Hope that helps.
It is a nice, simple kit, though. Perfect for busting up a drought!