A stapling device for stapling various size sheets includes a stapling head that is movable along a travel path for adjusting the various sheet stapling positions. The stapling device includes a plurality of cooperating anvils having first and second surfaces for cooperating with the first and second legs of a staple being used by the stapling head. One of the anvils has a centrally located third cooperating surface that cooperates with the first leg of the staple when the stapling device is in a first sheet stapling position, and with the second leg of the staple when the stapling device is in a second and different sheet stapling position.