These team issued bat boy jerseys were collected after the 2016 season. The blue batting practice jersey is a size 46, and the blue alt. home is a size 40. Do not miss the opportunity to own this unique piece of Mets memorabilia. The Mets net proceeds from memorabilia sales benefit the Mets Foundation. For more information about the Mets Foundation and/or Amazin' Memorabilia, please visit mets.com/gameused. The availability of items varies, but for questions about this piece or different numbers, players, colors, or sizes please contact Amazin Memorabilia, The Official Source for New York Mets Game Used and Autographed Memorabilia, by emailing email@example.com or by calling 718-559-3144. An MLB Authentication Program tamperproof hologram is affixed to each piece of Amazin Memorabilia. For more information on this item, visit http://mlb.mlb.com/mlb/authentication/and enter the hologram listed above.