In reply to davenev:
Big and flappy sums up Paramo design aims. As for absolute size, I normally take a medium but with my MR Paramo Aspira Pro trousers use a large. With the Paramo Aspira Pro jacket I take a medium and normal use a medium.
Paramo trousers are a bit like PHD ones, flappy, excess material and a bit crude but solid. Not sure what newer ones are like since my team do not use Paramo now. Although I refuse to hand back my Aspira Jacket, love Paramo jackets if twice as heavy as everything else.
But I never used the trousers, much too uncomfortable for me.