SHERIDAN, Wyo. – One of the most common complaints in online jewelry shopping is “Buyer’s Remorse” upon opening the box: the diamonds look smaller than they did on the screen. A new consumer guide from LearningJewelry.com aims to fix this by shifting the focus from “Carat Weight” to “Millimeter Size.”

The guide, titled 6mm Lab Grown Diamond Stud Earrings: Size Guide, explains why “Carat” (a measure of weight) can be misleading and provides a visual reference for how different sizes actually look on the ear.

The “Hidden” Size Difference: The report highlights a critical fact for 2026 buyers: diamond cut quality affects visual size. A poorly cut diamond may “hide” its weight in the bottom of the stone, looking smaller than a well-cut diamond of the same weight.

“Shoppers often obsess over hitting the ‘1 Carat’ or ‘2 Carat’ mark, but nobody carries a scale with them,” explains Mehmet Y., CEO of LearningJewelry.com. “What matters is the face-up diameter. Our guide shows that a 6mm diamond- roughly 0.75 to 0.80 carats – is often the ‘Goldilocks’ size. It offers a substantial look without the heavy price tag of a full 1-carat solitaire.”