Copied this from another suit thread I posted in. Hopefully it gives some context at least.
I’m in the UK, and ordered a TruSpec 27-P from Amazon. Took about two weeks to get here (quicker than advertised!)
I’m 6 foot tall, 95kgs, with a 44 chest and a 34 waist. I ordered a large, and bar the sleeves being a bit short (expected), it fits decently. I can get some decent billow at the boots and waist, and it isn’t too snug anywhere.