Today only (6/9) Carters.com has free shipping on any size order. This site is worth a look, as they have huge discounts on summer essentials. All clearance items drop an additional 20% when added to your cart I found the tee and shorts (above) on clearance for $6.39 (when added to cart). Entire outfit: $12.78 shipped!
You can get the same free shipping offer from sister site OshKosh, where you can find tees starting at $4.99 shipped. Use code: JPDM1517 to get 15% off your entire purchase or code: C441Q2SH to get 20% off $40+ (excluding clearance & doorbusters). Shown above: tee and shorts are $7 each, or both for $11.20 shipped after code.