Let your kid root for his favorite team this NFL season in this Youth Alvin Kamara New Orleans Saints Nike Game Jersey - Black. This jersey from Nike has screen printed name, numbers, and logos. The collar is tagless, which makes for a more comfy fit. The design is made for movement. Nike Youth Game Jersey Size Chart Youth Small Medium Large X-Large Chest (in.) 33 36 39.5 42.5 Waist (in.) 33 36 39.5 42.5 Back Length (in.) 23 25 27 29 Tips for choosing the correct Nike NFL Jersey size: If you plan to wear shirts or other layers under your jersey, you may want to order the next size up to ensure a comfortable fit. If your measurement is between two sizes you can either order the smaller size for a tighter fit or the next size up for a looser fit.