I've done both shirts and pants via measurements. Pretty decent turn around time for both. Nice construction for the price on the cheaper fabrics, plus being able to ask for whatever you want in regards to customisation is nice.
You can either mail them a pair to copy (and stipulate modifications) or just pump in measurements you take at home. They will do decent inseams with cuffs, though. I've got a couple of pairs of chinos from them with 34" inseam with two inch cuffs.
I believe most people wear 1 size down from US size for most Meermin lasts, aside from 'New Ray' which is half a size down from us. I am assuming you are looking at the two black oxford captoes; One is a 'stitched and reversed' style, where the uppers are stitched and then flipped over to cover the stitching. Other than that they are identical. Can't help you with pics. Anywhere from 10 days plus shipping to 3 months plus shipping. The Meermin trees,...
http://www.herringshoes.co.uk/product-info.php?&shoeid=2766&colourid=1483&brandid=6 http://www.herringshoes.co.uk/product-info.php?&brandid=6&shoeid=5237 http://meermin.es/ficha_articulo.php?id=1956 http://meermin.es/ficha_articulo.php?id=1942 http://www.herringshoes.co.uk/product-info.php?&brandid=7&shoeid=204 Any reason you're looking at suede only? There's a lot of good calf/grain calf options around that range too.
I believe they offer wider fittings in some lasts/sizes, as well as some of the lasts being more generous in fit than others. Might be best to email Rezso for specific information, as he knows the lasts best/has them on hand.