The Adjustable Strap Option is available on every one of our Non-Slip style headbands and just add's $2 to your cost! It will fit down to a toddlers size head and up to the largest size melon out there. The real perk to this strap is that if you're super picky on the fit of your headband then this custom fit adjustable feature will be the perfect solution for you! A perfect fit every time! And you can even share your bands now with your children, which then affords you the ability to buy more great designs, while teaching them what sharing's all about! A Win Win!!