This Autographed White Nike Swingman Jersey has been Personally Signed by Shai Gilgeous-Alexander of the Oklahoma City Thunder. This item is 100% Authentic and comes with a PSA/DNA Certification numbered Hologram. Please note that PSA/DNA no longer provides serial-numbered COA cards, and the attached PSA/DNA sticker will serve as the complete authentication for this item. The authenticity can be verified on Professional Sports Authenticators website. This is a Large sized Jersey.