This is an authentic Mitchell & Ness Cal Ripken Jr jersey. It is size 40, which is a medium. It is unused and still in its package from Mitchell and Ness. I will provide the packing slip that it came with. 

This is your opportunity to buy this hard to find jersey. It normally retails for $275. 

Beware of all the fake jersey out there. I stand by my guarantee that this jersey is authentic and straight from Mitchell and Ness.