This Autographed Navy Blue Pro Style Jersey has been Personally Signed by Rob Gronkowski of the New England Patriots. This item is 100% Authentic to include a Certificate of Authenticity (COA) / hologram by JSA. We conducted an autograph signing with Rob Gronkowski where multiples of the same item were signed. While the photographs are representative of this item, the size, placement and strength of the signature may vary. Each item is hand signed, therefore, each autograph is unique. This item can be verified through JSA. This is a X-Large sized, non-branded, custom-stitched Jersey.