I recently completed a shirt for my brother from the #011 pattern. The pattern and instructions were excellent! May I strongly suggest that you follow the pattern's fabric requirements: cotton
for the body and linen
for the collar and cuffs. I didn't follow the suggestion
, and it is there for a reason. I made up the whole shirt using a nice light/medium weight linen, and after starching I had to rinse a lot of the starch out again because the shirt was much too stiff. Linen absorbs much more starch than cotton does. It's quite ingenious, really, to make only the collar and cuffs from fine linen for starching purposes, as well as others. I just wish that I had done so
. Of course, a shirt with detachable collar and cuffs could be made of linen and starched much lighter. (That's next on my sewing list).
Anyway, regarding the linen you found, since it will be for the collar and cuffs only, I think that the light/medium weight would be fine. The weave should be pretty even and "fine" looking, if you know what I mean. The cuffs and collar should look their best since they will been seen when the shirt is worn. Also, selecting a fine (high quality) cotton for the body will be a good investment considering the hours of hand-work you will put into making the shirt.