Ideal Moissanite Proportions—2026 Ratio Guide

You have chosen your shape. You know you want an Oval or a Cushion, or an Emerald.

But when you go to buy, you see a confusing specification: L/W Ratio: 1.35. Or maybe 1.50.

Does it matter? Yes.

Length-to-Width (L/W) Ratio determines the personality of your stone. It dictates whether your Moissanite looks chubby and wide, or skinny and elegant.

Furthermore, because Moissanite is highly refractive, choosing the wrong ratio can actually increase the Bow-Tie Effect which is a dark shadow across the center.

At La Pretti, we curate our stones to fall within Ideal Range. But personal preference plays a huge role. Here is your definitive guide to Moissanite ratios so you get exactly the look you want.

What is L/W Ratio? (The 101)

It is simple math. You take the Length of the stone (mm) and divide it by the Width (mm).

• Ratio of 1.00: A perfect square or circle.

• Ratio of 1.50: A rectangle that is 1.5 times longer than it is wide.

Why it matters for Moissanite:

Unlike diamonds, Moissanite is often sold by millimeter size (e.g., 9x7mm) rather than carat weight.

• A 9x7mm Oval has a ratio of 1.28 (Classic).

• A 10x7mm Oval has a ratio of 1.42 (Elongated).

Same width, different look.

1. Oval Cut Moissanite

Most popular shape of 2026.

Ovals are tricky. If they are too round, they lose their slimming effect. If they are too long, the Bow-Tie shadow becomes severe.

• Chubby Look: 1.25 – 1.33

  • Vibe: Classic, traditional. Covers more width on the finger.

• Ideal Look: 1.35 – 1.45

  • Vibe: Goldilocks zone. Perfect balance of elongation and width. Best for hiding the bow-tie.

• Skinny Look: 1.46 – 1.60

  • Vibe: Very trendy and dramatic. Maximizes finger length.

  • Warning: Higher risk of a dark bow-tie shadow in the center.

La Pretti Pick: We recommend a 1.40 ratio (e.g., 10x7mm or 11.5x8mm) for the perfect modern Oval.

2. Elongated Cushion Moissanite

Romantic favorite.

Standard cushions are square (1.00 ratio). But the trend is Elongated Cushions.

• Square-ish Look: 1.00 – 1.09

  • Vibe: Compact and symmetrical.

• Slightly Elongated (Ideal): 1.10 – 1.20

  • Vibe: Soft and pillowy. It looks like a rectangle but retains the soft corners. This is the most popular choice for engagement rings.

• Very Elongated: 1.21+

  • Vibe: Starts to look like a Radiant cut with rounded corners.

3. Emerald & Radiant Cut Moissanite

Rectangular powerhouses.

For these step-cuts (Emerald) and brilliant-cuts (Radiant), the ratio changes the elegance significantly.

• Boxy Look: 1.20 – 1.30

  • Vibe: Looks wider and heavier. Good for hands with wider fingers.

• Classic Look: 1.35 – 1.45

  • Vibe: The traditional "Tennis Court" proportion. Elegant and sophisticated.

• Model Look: 1.50 – 1.60

  • Vibe: Very slender and finger-lengthening.

4. Pear Shape Moissanite

Teardrop.

Pears are subjective. Some like them plump; some like them narrow.

• Plump Pear: 1.45 – 1.55

  • Pro: Great light return (sparkle).

• Ideal Pear: 1.55 – 1.65

  • Pro: The classic teardrop silhouette.

• Narrow Pear: 1.70+

  • Con: The tip can be very fragile, and the stone may look starved.

Quick Reference Chart (2026 Standards)

Save this chart for when you are browsing our collection.

A Note on Depth and Table—Technical Stuff

Ratio is about Shape. But Depth and Table are about Sparkle.

Because Moissanite interacts with light differently than diamonds, it requires specific angles to avoid looking glassy.

• Depth %: How deep the stone is. If it's too shallow (<60%), the stone will look dark (like a window).

• Table %: The width of the flat top facet.

At La Pretti, you don't need to worry about the technicals. We only stock stones cut to Ideal Depth/Table Percentages to ensure maximum fire. You just pick the Ratio (Shape) you love; we handle the Sparkle.

Trust Your Eye

There is no wrong" ratio, only the ratio that fits your hand.

• Long fingers? You can pull off Chubby stones (Lower ratio).

• Short fingers? Go for Elongated stones (Higher ratio) to create the illusion of length.

Ready to find your perfect fit?

Browse La Pretti collections, where every stone’s dimensions are clearly listed.

♦️|Shop Ideal Ovals|Shop Elongated Cushions|Shop Emerald Cuts|aking.