This CUSTOM NY Mets City Connect Alternate Jersey has been personally hand-signed by All Star Slugger Pete Alonso. Custom Jerseys do not have any branding and are approximately XL in size. This item was signed in the presence of and witnessed by a representative of James Spence Authentication. It comes with an individually numbered, tamper evident sticker from JSA which can be reviewed online to ensure authenticity. This process helps to ensure that the product purchased is authentic and eliminates any possibility of duplication or fraud.