The exact boundaries of the kingdom remain uncertain, though it is likely that they coincided with those of the old Diocese of Worcester, founded in 679–80, the early bishops of which bore the title Episcopus Hwicciorum.
As fronteiras exactas do reino permanecen incertas, aínda que probabelmente coincidisen coas da antiga diocese de Worcester, fundada en 679–80 e cuxos primeiros bispos utilizaron o título de Episcopus Hwicciorum "bispo dos Hwicce".