Birmingham , Coventry , Dudley , Sandwell , Solihull , Walsall and Wolverhampton are metropolitan boroughs of West Midlands , Mercia .
The West Midlands comprises the metropolitan county of ( 7 ) West Midlands ( with its metropolitan boroughs ) , the non-metropolitan counties of ( 4 ) Staffordshire , ( 6 ) Warwickshire and ( 8 ) Worcestershire ( with their respective districts ) , and the unitary authorities of ( 1 ) Herefordshire , ( 2 ) Shropshire , ( 5 ) Stoke-on-Trent and ( 3 ) Telford and Wrekin .
Mercia