maybe somebody here will know about this... I'm wondering how British Army sizing works - what sizes 1, 2, 3, 4, 5 etc correspond to in actual measurements... there must be a table somewhere? not sure when NATO sizing was adopted instead, but old numbered sizes are found alongside NSN numbers in labels (when Britain had already been NATO member for decades) - maybe in the '80s? I'm wondering specifically about sizing for the Cadet Smock as looking to get one - to further complicate things sizing might be different for ACF clothing given that they were intended for teenagers (given cut of smock they'll easily fit adults and I read they were in fact popular in the British Army as windproof item).