For size, measure around the largest part of hand at the base of thumb with hand slightly cupped as if putting on a bangle. (See photo)
 
x small        4.5"    Newborn 
small            5"      Baby-2 Years 
medium     5.5"    Toddler 
large            6"       4-5 Years  +$5
x large         6.5"    6-7 Years +$5
* Size 7" and up, see adult Wave Bangles 
 
$7 for Added Heart Charm

If you are ordering multiple bangles, please specify which bangle you would like a heart added to.