I find Context styles EG on the smaller/slimmer side.
Engineered Garments SS 16 - Page 14
I've talked to Charlie over at Notre, and this is what Notre has in store that you can order over the phone, and it should be online for viewing soon:
I have 2 pairs of EG pants now - SS14 olive ripstop fatigues and FW14 grey Hawaiian print Lafayette pants - both labeled Xl and both fit amd measure 39-41" at the waist.
I guess I'm looking for XL tagged pants that run large.
The Bureau Belfast sometimes has 38w in main line. Some of those tagged 36" are nearer 37". The Workaday XL's tend to measure 38" (although not the cords).
Part of Bureau's SS16 delivery is now up.
I don't have a lot of experience with TBB, but the little experience I do has been that their measurements were accurate. They're pretty responsive too, though, to e-mails. You could always e-mail and ask them if they'd confirm the p2p measurement for you.
Both Nepenthes JP and Kinknagoya list the width of the medium at 58.5 cm. I trust Nepenthes since they put it out and Kinknagoya has always had accurate measurements in the past.