This paper presents a general sizing procedure of axial-field flux switching permanent magnet (AF-FSPM) machine for various topologies. A comprehensive approach is used for design of AF-FSPM machine and the design flowchart is presented. A three phase, 12/10 single-stage AF-FSPM machine is designed and three dimensional finite element analyses are performed to validate the design procedure. The magnetic flux distribution, induced EMF, and cogging torque has been computed. It is found that the results confirm the presented procedure.