I'm admittedly a new-comer to Scottish traditions and attire, but I'll offer my opinion anyways. The pictures posted above don't really fit into my mental image of "Trews" based on my understanding from former threads on the subject.

Both Matt's and Glen's look to be more what I would describe as tartan trousers given the lower waist, belt, and rather wide legs. Sandy...your father's are a bit trimmer through the leg and look a bit better to my eye. I'll admit that I might be misinformed, but my understanding is that trews are higher waisted, have narrow legs, and a higher fishtail back. Perhaps my definition is overly narrow.

That being said, if I were ever to wear a pair of trews, I'd want them to fit more like the fine looking military officers seen in this photo which I harvested from the Royal Caledonian Ball website:



I mean no offense to any of you gentlemen that have posted here...so please don't take any. As I said, just offering my thoughts...and another picture for the masses.