The Original Peekaru Vest is the perfect accessory to your Baby Carrier. You'll love the style, and your baby will love the comfort. Made from 85% recycled high quality eco friendly Polartec fleece, each Peekaru Vest saves approximately 25 plastic bottles from reaching the landfill. In addition, Polartec fleece is Oeko-tex Standard 100 "for textile products of all types which pose no risk whatsoever to health." Feel good knowing that while you are holding your baby close, you are also helping the environment. Picking the Right Size:. Choosing the size that will fit you best is easy. Simply purchase your regular size, the pleated seam and stretchy fleece will accommodate any size baby. If your shirt size is medium, a medium Peekaru Vest is right for you. Small: 4 - 6, Arm Circumference 15" or less, Shoulder to Shoulder 15.5" or less. Medium: 8 - 10, Arm Circumference 15.5" - 16.5", Shoulder to Shoulder 16". Large: 12 - 14, Arm Circumference 17" - 18", Shoulder to Shoulder 16.5". Made in cooperation with TogetherBe and Beco Wearing.