Height (incl. cover): 130mm, Diameter (cover): 160mm.
Large quantities of these mines were used by the Germans during ww2 on the Atlantik wall defences. These were the remaining stocks of the British army on retreat to England in 1940. The fuzes were renamed "Mi.Z.530 (e)". I don't know the German name for the mine.
Photos below thanks to J.P Dijkman.