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

0.40 carat asscher diamond — 4.2 × 4.2mm
  1. Guidance
  2. Diamond Guide
  3. Diamond Sizes
  4. Asscher
  5. 0.40ct

0.40 Carat Asscher Diamond

A 0.40ct asscher diamond measures 4.2 × 4.2mm. See it at true 1:1 scale on your screen and compare with other sizes.

0.40ct Asscher — Key Dimensions

Length (approx.)

4.2mm

Width (approx.)

4.2mm

Weight

0.40ct

0.30ct Asscher0.50ct Asscher

0.40ct in Other Shapes

Round Brilliant — 4.8 × 4.8mmOval — 6.0 × 4.0mmCushion — 4.5 × 4.0mmEmerald — 5.0 × 3.5mmPrincess — 4.2 × 4.2mmPear — 6.0 × 4.0mmMarquise — 7.4 × 3.7mmRadiant — 4.5 × 4.0mmHeart — 4.7 × 4.7mm

All Asscher Sizes

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

Looking for a 0.40ct asscher?

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
  • Asscher Sizes
  • 0.40ct Asscher
Book a Consultation