You mean Inis Meains? Their small fits me fine, and I'm a 36 chest. I wear stuff somewhat traditionally sized - not baggy or tight - but I can imagine a 38 chest going with a small as well. I assume measurements of various Inis Meain sweaters can be found on NMWA's website. They have the crewneck linen in various Donegal yarns.
I'm a slim 38 and a small from FW13 fits me very well, but I have to size up to medium for SS14 for the same fit. (I'm talking about gansey & Aran cable crewnecks from FW13 and the grey linen donegal & grey birdseye crewnecks from SS14.) I believe Kyle posted a picture of himself in a small grey linen donegal in this thread. Is Kyle's suit size 36?
Additional note: I can only wear the grey linen donegal in medium with a T-shirt underneath, but I can wear the grey birdseye over a dress shirt or a T-shirt. The grey birdseye fits looser, and that's reflected in the measurements posted on the site.
Edited by Asian Afro - 3/12/14 at 1:41pm