Meh to BB ESF

I took advantage of the post-xmas sales on Monday and ordered 8 "extra slim fit" shirts from Brooks Brothers.

They seem to be made very well, nicer than my Tyrwhitts, but they're still not slim enough. I think I'll have to get a tailor to dart the backs or something. Arms are also a little too roomy, IMO, and I've got decent sized arms.

Anyone else have this problem? Are companies afraid to make a seriously slim shirt?

I'm like 5'10" 160lbs 12% BMI, so not a waif. What do really skinny people do?