---
title: "Table size: meaning in gemology"
description: "Table size is the width of the table as a percentage of the average diameter."
url: https://digitalgemology.com/learn/glossary/table-size
image: https://digitalgemology.com/img/og-digital-gemology.png?v=d224fb01
---

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[Glossary](https://digitalgemology.com/learn/glossary) · Anatomy and proportions

# Table size

Also called table percentage, table percent

Table size is the width of the table as a percentage of the average diameter.

## In more detail

GIA's Excellent limit for the table alone is 52 to 62%. GIA also grades it together with the crown and pavilion angles. At the same crown angle, a bigger table makes a lower crown and a shallower stone. Bigger is not automatically brighter.

## On a grading report

On the proportion diagram as "table". IGI's Ideal band is 53 to 60%.

## Related terms

- [Table](https://digitalgemology.com/learn/glossary/table): The table is the large flat facet on top of a cut stone, an octagon on a round brilliant. Much of the light enters through it.
- [Crown height](https://digitalgemology.com/learn/glossary/crown-height): Crown height is the height of the crown, from the girdle to the table. It is a percentage of the average diameter.
- [Crown angle](https://digitalgemology.com/learn/glossary/crown-angle): The crown angle is the slope of the bezel facets, measured against the plane of the girdle.
- [Cut grade](https://digitalgemology.com/learn/glossary/cut-grade): The cut grade rates how well a diamond's proportions and finish work, from Excellent to Poor. GIA gives it only to standard round brilliants in the D-to-Z color range.
- [Ideal cut](https://digitalgemology.com/learn/glossary/ideal-cut): "Ideal cut" has three meanings: an IGI comment, a GIA supplement grade, or a sales word. At IGI it marks an Excellent round with narrower proportions; at GIA it appears only as "AGS Ideal".

## Learn more

- [Diamond table percentage: what table size does to the light](https://digitalgemology.com/learn/diamond-anatomy/diamond-table-percentage)
- [How to read the proportion diagram on a diamond report](https://digitalgemology.com/learn/grading-reports/diamond-proportion-diagram)
- [What "ideal cut" means on a diamond report](https://digitalgemology.com/learn/grading-reports/what-ideal-cut-means)

[All 328 terms](https://digitalgemology.com/learn/glossary)