Enter finger circumference
Measure in the evening
It’s best to measure at the end of the day because fingers tend to swell during the day.
Keep Hands Warm
Cold can shrink your fingers, so to get most accurate size, be sure your hands are warm when you measure.
Size Up for Thick Bands
Since thicker bands feel tighter than thinner, daintier ones, choose a size up for thick bands.
Tear a thin strip of paper
Wrap the paper snug around your finger, make sure it's nice and tight and mark the spot where it meets
Measure the distance with a ruler (in mm); that's your finger's circumference