3 Carat Round Cut Solitaire Engagement Ring
Measure at home with confidence — printable sizer or your existing ring.
How to measure
Use an existing ring
Match the inside of your ring to the closest circle on the printable guide. The circle should sit inside the ring with minimal white showing.
Use the finger sizer strip
Print at 100% scale on US Letter. Cut out the strip, cut the slit, wrap it around your finger with numbers visible, and read the number closest to the opening. Slide it over your knuckle and choose a size that feels comfortable.
Quick fit tips
- Measure at the end of the day (fingers are slightly larger).
- Avoid measuring when hands are cold.
- If you’re between sizes, go up for comfort.
- Wide bands can feel tighter — consider +0.5 size.
Ring Size Chart (AU/UK)
Measurements shown in diameter and circumference.
| AU/UK Size | Diameter (mm) | Circumference (mm) |
|---|---|---|
| H 1/2 | 15.0 | 47.1 |
| J 1/2 | 15.8 | 49.6 |
| L 1/2 | 16.5 | 51.8 |
| N 1/2 | 17.2 | 54.0 |
| O 1/2 | 17.9 | 56.2 |
| Q 1/2 | 18.5 | 58.1 |
| R 1/2 | 19.1 | 60.0 |
| T 1/2 | 19.8 | 62.2 |
| U 1/2 | 20.3 | 63.8 |
| W 1/2 | 21.0 | 66.0 |
| X | 21.6 | 67.9 |
| Z | 22.3 | 70.1 |
FAQ
What if I’m buying a surprise gift?
If you can borrow one of their rings, measure the inside diameter. If unsure, pick a common size and we can guide resizing later.
Should I size up for thicker bands?
Often yes — thicker bands feel tighter. If you’re near the top end of a size, go up by 0.5.
Can you help me confirm my size?
Yes — send us your measurement (mm) or a photo of the printed sizer on your finger and we’ll confirm.
- Free Resizing
- Lifetime Warranty
- Free Ring Customisation*
- Free Insured Shipping on all orders
3 Carat Round Cut Solitaire Engagement Ring (Natural Diamond)
A timeless high-end solitaire designed to highlight a brilliant 3 carat round cut natural diamond. Crafted with a clean, refined profile and a slim 2.2mm band, this ring is made for maximum sparkle and everyday elegance. Choose your perfect finish in 18K Yellow Gold, 18K White Gold, 18K Rose Gold, or Platinum.
Why You’ll Love This Ring
- Iconic solitaire look: all attention on the centre diamond
- High-end finish: premium metal options and precise craftsmanship
- Perfect proportions: elegant 2.2mm band for a refined silhouette
- Certified natural diamond: includes GIA certificate
Ring Specifications
Metal & Band
18K Yellow Gold, 18K White Gold, 18K Rose Gold, Platinum
2.2mm
Natural Diamond Specs
3.00 CT (approx.)
Round Cut
VS2
J
Excellent
GIA
Crafted for a Classic Proposal
The round cut is loved for its bright, balanced sparkle and timeless appeal. This solitaire setting is designed to keep the centre stone as the hero—clean, elevated, and forever in style.
Customisation & Ordering
Choose your metal colour and ring size at checkout. If you’d like help selecting the best diamond look for your preferences, contact us and we’ll guide you through the options.
Shipping & Packaging
- Delivered in a premium ring box—ready to gift
- Secure shipping and careful presentation for a high-end unboxing experience
Note: Diamond characteristics are based on the listed specifications (VS2 / J / Excellent / GIA). Natural diamonds may show unique inclusions and characteristics—part of what makes each stone one of a kind.
Order this piece online today! Crafted with care, it takes 6 weeks to create. Need it sooner or want a personal touch? Contact us—we’re happy to make it perfect for you!
