Here are my part-done CO and HQ bases. I did CO on 50mmx50mm squares and HQ on 40mm square.
German CO with the Heroics & Ros Rommel personality strip, a Panzer I command tank, ‘Mammut Moritz’, his half-inched Dorchester (still in caunter), and a motorcycle&sidecar.
German HQ with another befehlskampfswagen or whatever (Panzer I command tank), a half track and some pointy blokes.
British CO with a Dorchester, an AEC (which looks really oversized, were they that big?), and some posh gits barking orders.
British HQ again with an AEC and this one with a carrier and a few more poshos pointing at stuff.