US
10.5
=
Europe
63
(63.4mm)
Also: UK UJP 22
Nearby Sizes
Try Another Size
Type a size to convert
Full Size Chart
| US | UK | EU | JP | Inner circumference |
|---|---|---|---|---|
| 3 | F | 44 | 4 | 44.2mm |
| 3.5 | G | 45.5 | 5 | 45.5mm |
| 4 | H | 47 | 7 | 46.8mm |
| 4.5 | I | 48 | 8 | 48mm |
| 5 | J | 49 | 9 | 49.3mm |
| 5.5 | K | 50.5 | 10 | 50.6mm |
| 6 | L | 51.5 | 12 | 51.9mm |
| 6.5 | M | 53 | 13 | 53.1mm |
| 7 | N | 54 | 14 | 54.4mm |
| 7.5 | O | 55.5 | 15 | 55.7mm |
| 8 | P | 57 | 16 | 57mm |
| 8.5 | Q | 58 | 17 | 58.3mm |
| 9 | R | 59 | 18 | 59.5mm |
| 9.5 | S | 60.5 | 19 | 60.8mm |
| 10 | T | 62 | 20 | 62.1mm |
| 10.5 | U | 63 | 22 | 63.4mm |
| 11 | V | 64 | 23 | 64.6mm |
| 11.5 | W | 65.5 | 24 | 65.9mm |
| 12 | X | 67 | 25 | 67.2mm |
| 13 | Z | 69.5 | 27 | 69.7mm |
Convert US 10.5 to Other Systems
US size 10.5 in ring converts to EU size 63. This is based on standard international sizing charts. Your measurement of approximately 63.4mm corresponds to this size. Keep in mind that sizes can vary slightly between brands and manufacturers. We recommend checking the specific brand's size guide when available for the most accurate fit.
Frequently Asked Questions
What is US 10.5 in EU ring?
US size 10.5 in ring is equivalent to EU size 63. This conversion is based on standard international sizing charts and is widely accepted across brands and retailers.
What is US 10.5 in other sizing systems?
US size 10.5 in ring converts to: UK U, EU 63, JP 22. Use our converter above to see all available systems.
Is US 10.5 the same as EU 63?
Yes, US 10.5 is equivalent to EU 63 in standard ring sizing. However, fit can vary between brands, so trying on items or checking brand-specific size charts is always recommended.
How accurate are ring size conversions?
Our size conversions are based on international standards and verified against multiple authoritative sources. They represent the most widely accepted equivalents. However, individual brands may size slightly differently, so we recommend trying items on when possible or checking the brand's own size guide.
Explore Other Converters
Need help? Read our How to Measure Ring Size guide.