
Measure a Ring That Already Fits
Option 1
Already have a ring that feels right? This is a simple and accurate way to discover your size.
What to do:
- Choose a ring that fits the exact finger you plan to wear your new one on.
- Measure the inner diameter of the ring in millimeters (mm) using a ruler or caliper.
- Match your measurement to our sizing chart below to find your closest LUCEN BLOOM size.
Tip: Even a 1 mm difference can shift your size. Try to measure precisely, and make sure the ring is perfectly round.

Use a Paper or String at Home
Option 2
No ring to reference? No problem. You can measure your finger directly.
How to measure:
- Cut a slim strip of paper or use a soft piece of string.
- Gently wrap it around the base of your finger: not too tight, not too loose.
- Mark where the ends meet.
- Measure the full length (circumference) in millimeters.
- Refer to our chart to convert it into your ring size.
Note: Finger size can change slightly depending on the time of day. Evening is usually best for a more accurate fit.

Not Sure? We’ll Send You a Sizer.
Still feeling unsure? We’re happy to help.
LUCEN BLOOM offers a complimentary ring sizer shipped right to your doorstep so you can find your perfect fit with ease and peace of mind.
Just reach out to us via the Chat and we’ll take care of the rest.

Other Jewelry Sizes
If you’re choosing bracelets, necklaces, or bangles and need sizing guidance, our team is here to help. Every piece is designed to feel beautiful and feel like you. Simply get in touch, and we’ll assist with personalized recommendations.

Designed to Fit. Made to Last.
At LUCEN BLOOM, every detail matters. From size to sentiment, we want your ring to feel like it was always meant to be yours because when something fits well, it stays close.












