The journal

• Oval vs round engagement rings: how they compare on the handAt 1 carat an oval faces up about 9% larger than a round, and natural ovals cost less. Rounds are brighter, and lab-grown ovals often cost more.
• Engagement ring statistics 2026: cost, lab-grown share, shapes and timingCouples married in 2025 spent $4,600 on average on an engagement ring, per The Knot. 61% chose lab-grown, the average stone was 1.9 carats, and round led oval.
• What people designing their own engagement ring chose: DreamRing data, October 2026In 67 engagement ring designs made in DreamRing, ovals led with 37% of shape picks, rounds had 8%, and 86% were open to a lab-grown center stone.
• How to design an engagement ring with AI that a jeweler can actually makeUse AI for the look, then give your jeweler numbers: stone size in mm, prong count, a 1.8 to 2.2 mm band and setting height. Prompts and a mistake checklist.
• Carat size chart: diamond mm by shape and how each looks on your fingerA 1 carat round diamond is about 6.4 mm across and a 1 carat oval about 8 x 5.5 mm. Sizes for 8 shapes from 0.5 to 3 carats, and on size 4, 6 and 8 fingers.
• The best AI engagement ring generators in 2026, and how to get one madeGemini and ChatGPT are the best free AI ring generators in 2026 and can put a ring on your hand photo. Any design still needs a jeweler to model it in CAD.