They make them from trouser fabrics with a bit of stretch, so I might size up slightly and make a test pair in non stretch woven fabric to see if that matters or not. I'll do the version without the buttons and turnups.
If you haven't got a Burda mag from 2010 and want to make them, they are up on Burda style for purchase for £3.99.
For SWAP I plan to make these in brown and teal.
According to the Burda size chart I need size 48 trousers, I thought the 42 were only slightly too small and it should be something more like 44 or maybe 46 but hey!