CA Men & Women Ring Size Guide
See common CA size ranges and tips for choosing the right fit
Common Women's CA Ring Sizes
- CA 4 ~ 8(UK H ~ P)Most common: CA 6 ~ 7 (UK L ~ N)
- Diameter: 14.9mm ~ 18.2mm
- Circumference: 46.8mm ~ 57.1mm
- EU 47 ~ 57European sizing
- JP 7 ~ 16Japanese sizing
- Small(CA 4 ~ 5 (UK H ~ J))For slender fingers
- Medium(CA 6 ~ 7 (UK L ~ N))Average women's size
- Large(CA 7.5 ~ 8 (UK O ~ P))For larger hands
Tips for Accurate Sizing
- Measure your finger at the end of the day when it's largest.
- Cold fingers are smaller, warm fingers are larger.
- Wider bands feel tighter; consider sizing up for wide rings.
- If between sizes, choose the larger size.
- Your dominant hand is usually slightly larger.
- Knuckles can be wider than finger bases; ensure the ring slides over comfortably.
- Pregnancy and weight changes can affect ring size; consider temporary adjustments.
- Seasonal changes can affect finger size; summer fingers may be larger due to heat.
- For accurate sizing, measure 3-4 times on different days.
Understanding CA Ring Size Measurements
CA ring sizes are measured in several ways:
- Inside Diameter: The measurement across the inner circle of the ring.
- Inside Circumference: The measurement around the inner circle of the ring.
- Numerical System: CA uses numbers (3-16), with each number representing a specific diameter.
CA Ring Size System
The CA ring size system uses numbers rather than letters, following the same system as the US. CA sizes are measured in inches based on the inside diameter of the ring. This system is widely used across North America.
Finger Size Variations
Your finger size can change due to:
- Time of day (larger in evening, smaller in morning)
- Temperature (larger when warm, smaller when cold)
- Seasonal changes
- Weight fluctuations
- Medical conditions that cause swelling