If you don't mind a few comments from a lapsed catholic and former alter boy... The cassock, which you have in red, was black back in my day. The white overshirt, a surplus, did have short sleeves, ending just above the elbow and hung down to just below the hips. It had a square neck that hit just above the collar bone and was about an inch on either side of the neck. It was pleated, as I recall. Way back when, and I'm digging back in my memory some 40 years ago, we weren't allowed to wear any sort of necklaces or any other kind of jewlery. That sort of thing was reserved for the priests. I don't know about today, I'm not much of a church goer any more. Hope you don't mind my throwing in my two cents worth. Please forgive any mispelling. It's not really my strong suit.