Step 1: Calibrate Your Screen
Get accurate measurements by calibrating your screen with a credit card
1. Grab any credit or debit card
2. Place it over the blue card on screen
3. Adjust slider until they match exactly
4. Confirm & see your calibrated ring sizes
Step 2: Find Your Size
Place a ring you already own on the circles below to find your size
How to Find Your Match
The green circle lines up exactly with the inner edge of your ring
Green extends beyond your ring — the circle is too big, try a smaller size
Visible gap between the green circle and your ring — try a larger size
Tip: Place your ring flat on the screen directly on top of the circle. Look straight down — the green circle should disappear behind your ring's inner edge. If you're between two sizes, go with the larger one for comfort.
String & Paper Method
A simple at-home method using materials you already have. Follow these illustrated steps.
What You'll Need
String or paper strip
Ruler (mm)
Pen or marker
💡 Don't have string? Get creative! A phone charging cable, a thin strip of paper, dental floss, or even a twist tie will work — anything flexible that you can wrap around your finger and mark.
Wrap Around Your Finger
Take a thin strip of paper or string and wrap it snugly around the base of the finger where you'll wear the ring. It should be tight enough to stay in place but loose enough to slide over your knuckle.
Mark the Overlap
Where the paper/string meets to form a complete circle, mark both edges with a pen. These two marks show your exact finger circumference.
Measure in Millimeters
Lay the paper/string flat and measure the distance between your marks in millimeters. This is the inner circumference of your ring size.
Find Your Size
Match your circumference measurement to the ring size chart below. Find the closest match in the "Circumference" column — that's your ring size! Between sizes? Go up for a more comfortable fit.
Ring Size Chart
| US Size | UK Size | EU Size | Inner Diameter (mm) | Circumference (mm) |
|---|---|---|---|---|
| 3 | F | 44 | 14.1 | 44.2 |
| 4 | H | 47 | 14.9 | 46.8 |
| 5 | J | 49 | 15.7 | 49.3 |
| 6 | L | 52 | 16.5 | 51.9 |
| 7 | N | 54 | 17.3 | 54.4 |
| 8 | P | 57 | 18.2 | 57.0 |
| 9 | R | 59 | 19.0 | 59.5 |
| 10 | T | 62 | 19.8 | 62.1 |
| 11 | V | 64 | 20.6 | 64.6 |
| 12 | X | 67 | 21.4 | 67.2 |
| 13 | Z | 69 | 22.2 | 69.7 |
Pro Tips for Accurate Sizing
Measure at End of Day
Fingers are typically larger in the evening due to natural swelling. Measure after 4pm for the most accurate size.
Temperature Matters
Cold fingers can be up to half a size smaller. Warm up your hands first — run them under warm water for a minute.
Account for Knuckles
Your ring needs to slide over your knuckle. If your knuckle is noticeably larger than the base, size up half a size.
Ring Width Affects Fit
Wider bands (6mm+) feel tighter on the finger. Consider going up half a size for our chunkier ring styles.
Measure Twice
Take your measurement at least twice on different days. Finger size fluctuates — two consistent readings give you the most reliable result.
Free Size Exchanges
Not sure you got the right size? No stress. We offer free exchanges within 30 days of delivery — just swap it for the size that fits.
Start Your Exchange
Visit our returns portal to request a size exchange — it takes less than a minute.
Free Return Label
We'll send you a prepaid shipping label. Just pack it up in the original packaging and drop it off.
Get Your New Size
Once we receive your return, order the correct size and you're all set. Questions? Email hello@zaylanewyork.com
Ring must be unworn, with tags, in original packaging. See our full return policy for details.
Need a Printable Version?
Download our PDF ring sizer for the most accurate at-home measurement
Download Printable Ring Sizer (PDF)Frequently Asked Questions
Still Unsure About Your Size?
Our team is here to help you find the perfect fit