One thing I've noticed about the Sulka shirts I have is that they're all cut very full -- comparable to the Brooks Brothers cut, or bigger.
Yes, full. Don't think bigger than Brooks though. (May be wrong of course -- but difficult to get fuller cut than Brooks, no?) I knew a lot of Ivy League guys who would wear the stuff. It was well-known to be a purveyor of luxury -- almost sinfully so by standards of the New England haberdasher.