MOH

Customer Care

  • My Account
  • Delivery
  • Returns
  • FAQs
  • Ring Size Guide
  • Book a Consultation
  • About Us
  • Journal
  • Diamond Guidance
  • Contact Us
  • Privacy Policy
  • Terms & Conditions
  • Cookie Policy
  • Terms of Sale

© 2026 MOH London Ltd.

MyOtherHalf

MOH

Unit G.4 Ground Floor, Treasure House

19-21 Hatton Garden

London EC1N 8BA

+44 (0) 7586 775867care@mohlondon.com

Excellent · Google Reviews

0.25 carat round brilliant diamond — 4.1 × 4.1mm
  1. Guidance
  2. Diamond Guide
  3. Diamond Sizes
  4. Round Brilliant
  5. 0.25ct

0.25 Carat Round Brilliant Diamond

A 0.25ct round brilliant diamond measures 4.1 × 4.1mm. See it at true 1:1 scale on your screen and compare with other sizes.

0.25ct Round Brilliant — Key Dimensions

Length (approx.)

4.1mm

Width (approx.)

4.1mm

Weight

0.25ct

0.30ct Round Brilliant

0.25ct in Other Shapes

Oval — 5.0 × 3.5mmCushion — 3.8 × 3.5mmEmerald — 4.5 × 3.0mmPrincess — 3.5 × 3.5mmPear — 5.0 × 3.3mmMarquise — 6.0 × 3.0mmRadiant — 3.8 × 3.5mmAsscher — 3.5 × 3.5mmHeart — 4.0 × 4.0mm

All Round Brilliant Sizes

0.25ct0.30ct0.40ct0.50ct0.60ct0.70ct0.80ct0.90ct1.00ct1.25ct1.50ct1.75ct2.00ct2.50ct3.00ct4.00ct5.00ct

Looking for a 0.25ct round brilliant?

Browse our live diamond inventory or let us help you choose.

Browse DiamondsBook a Consultation

Diamond Guide

  • Diamond Guide
  • Diamond Shapes
  • Carat Weight
  • All Sizes
  • Round Brilliant Sizes
  • 0.25ct Round Brilliant
Book a Consultation