---
title: "Sigma Icon | Free Download PNG & SVG | Ultimate Bold"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/sigma--7556
canonical_url: "https://www.streamlinehq.com/icons/download/sigma--7556"
summary: "Sharp solid icon of a Greek sigma formed by top and bottom bars joined by angled strokes. Used for math notation and sums."
---

# Sigma icon

The Sigma icon shows a Greek sigma formed by thick horizontal top and bottom bars joined by angled strokes. Drawn in the solid style on a 24px grid so it stays bold and legible at small sizes. Use it for summation notation, mathematics tools, formulas, and educational interfaces. It belongs to Ultimate Bold set in the Ultimate family.

## Preview

![Sharp solid icon of a Greek sigma formed by top and bottom bars joined by angled strokes. Used for math notation and sums.](https://assets.streamlinehq.com/image/private/w_240,h_240,ar_1/f_auto/v1/icons/text-formating/sigma-egwaz15celfuff6pcney29.png/sigma-c7zaww9gkwq4w0tfjvhbw2.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Sigma
- **Type**: Icon
- **Set**: [Ultimate Bold](/icons/streamline-bold.md) — Bold style features strong, solid shapes for instant recognition. It gives excellent legibility on dark backgrounds.
- **Family**: [Ultimate](/icons/ultimate-sets.md) — The encyclopedia of icons
- **Style**: Solid, Filled, Bold, Glyph
- **Category**: Interface Essential › Text Formating
- **Default size**: 24px
- **Pricing**: Pro
- **License**: [Commercial](https://home.streamlinehq.com/license-premium)
- **Author**: [Streamline](https://home.streamlinehq.com/)
- **Formats**: PNG, WEBP, PDF, SVG, JSX
- **Tags**: sigma, sum, summation, formula, math, series, statistics, calculus, equation, greek, symbol, algebra, total, format, text, font, formatting, bold, italic, arrow, underline

## Download

- [Download Sigma on Streamline](https://www.streamlinehq.com/icons/download/sigma--7556)

## Also available in other styles

- [Sigma — Ultimate Colors](/icons/download/sigma--19617.md) (Pro)
- [Sigma — Ultimate Duotone](/icons/download/sigma--15811.md) (Pro)
- [Sigma — Ultimate Regular](/icons/download/sigma--9018.md) (Pro)
- [Sigma — Ultimate Light](/icons/download/sigma--8287.md) (Pro)

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