Normally the table dictates the plate size, and any router can be fitted to any plate. Kreg, Jessem and Incra all tend to be the same size at 9-1/4" x 11-3/4 or 235mm x 298mm .
Kreg instock here Kreg PRS4034 Router Table Insert Predrilled
Incra here Router Plates & Insert Rings
Kreg instock here Kreg PRS4034 Router Table Insert Predrilled
Incra here Router Plates & Insert Rings