Long Sleeves on Royal Tabards

I'd love if the royal tabards had long sleeves. A majority of medieval tabards, (after a quick search) seem to have an undershirt of some kind. So although the bean body showcases an opening that seems to imply it wouldn't have sleeves, I think long sleeves on the tabards would work much better. In particular, I believe a complimentary color would be best for the sleeves. (For example, the blue royal tabard could have either white, or a darker/lighter blue sleeves.)

The sleeves would allow many more outfit combinations to be made with the shirts, without them looking weird.