the linen shirts should make up a bit bigger, and then shrink a bit more with the first wash. I'd say to go with your usual size. After our experience with them last year, we found that they're a tough bigger all around, but IMO that works both functionally and stylistically. Linen should be cool and comfortable - you don't want it skin tight. And the fabric doesn't flex or give at all, so it can be unforgiving if its cut too close.
@EpauletGot it, thanks!
My first linen items ever (a while back, and not from EP) definitely got too small over time when taking my usual size , and that was interesting
My linen shirts from another brand are almost a full size up, but I'm in between sizes for them. For EP Individualized I'm almost a perfect XS. I'm still wondering if I should ask for an extra inch in body and chest just in case...