Size is relative. The seat tube length is not that important. It is the top tube length and the seat post angle. Even then with the right seat, seat post and stem it Will fit. Just think how much you can stretch out if the top tube length is longer than your normal ride. Take your normal setup measurements and see if you can make the bike match your normal riding position.

If the seat tube angle is the same as your normal ride the knee over pedal will be the same for the same seat height to pedal distance. Then you need the proper length stem. The handling will be different and you may not be able to drop the bars down low if you like that. Ride it and find out.