Soffe youth baseball tees

Never been worn set of 3 youth baseball tees. I brought a bunch for a Halloween costume idea when Sports Authority was closing. Navy & Red ones both still have tags while the green one does not. I wear adult small consistently & the large fits me perfectly. The medium is more fitted. All shirts in great shape but a couple of faint mystery spots on the front of the green one, & a mark on the side of the blue one (see pics) no idea where the marks came from but probably will come out w/ a wash!