Common size markers use wrist circumference: XS = 5.5", S = 6", M = 6.5", and L = 7". Listings also show overall bracelet lengths ranging from about 4.5" (baby) up to 7" for adult cuffs.
Many listings describe cuffs as dainty; typical widths are just under to just over 2 mm (about a 2 mm bangle), often marketed for stacking or minimalist wear.
The range includes adult sizes (often listed as suggested age 18+) and toddler/baby bracelets sized for 0–18 months (for example a 4.5" baby length), so options span both children and adults.
Measure your wrist snugly: cuffs typically fit slightly looser than that measurement. Some cuffs are slightly malleable or flexible so you can gently reshape them for a more comfortable fit.
Clean with gentle soap and water or a mild detergent and avoid harsh chemicals or abrasives. Store cuffs in a sealed bag when not in use. Some items also note spot-clean or wipe-clean only.