This Autographed Pinstripe Cooperstown Collection Authentic Mitchell & Ness Jersey with the inscription of "MVP 1969" has been Personally Signed by Harmon Killebrew of the Minnesota Twins. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by Beckett Authentication Services. The authenticity can be verified on Beckett Authentication Services website. This is a X-Large sized Jersey.