Originally Posted by the_state
^Sizing down on Workaday 19th c's is a little agressive. I'd suggest sticking with your size and rocking it loose as intended.
I agree on this with the exception of the workaday Chambray. Due to the thickness of the oxford fabric, the extra room in the shoulders and chest aren't super noticeable and it's not like you are wearing a sack. And if you wash and put them in the dryer for a bit, they'll shrink further you can get them down close to the fit of the workshirt.
The chambray version on the other hand is much thinner fabric and is unwashed afaik. I washed mine in warm and put it in the dryer multiple times, and it's a little looser than I'd like, so will probably stick to wearing it in the summer.
If you have intentions of wearing any of the workaday versions buttoned, you probably won't be able to size down also. Other than the shoulder and chest, the rest of the shirt is cut similar to non-workaday 19th century shirts.