Full cut with tapered shoulder seams for added strength and comfort, RedHead Short-Sleeve Camo T-Shirts for Youth are a great choice for developing hunters. 100% cotton. Ribbed neck and cuffs. Machine wash. Imported.
4T is a "Toddler" size, rather than a "Youth" size. A good rule of thumb is age equals size, or go one size larger. So if your grandbaby is 4 yrs old, a 4T ought to fit, or the next size up, 5T. This worked for my boys. Hope it helps.
This is an old question, but maybe someone else can use this info? :)