---
title: "Sigma Icon | Free Download PNG & SVG | Ultimate Regular"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/sigma--9018
canonical_url: "https://www.streamlinehq.com/icons/download/sigma--9018"
summary: "Clean line icon of a capital sigma shape with angled sides. Used for math, summation, formulas, and statistics."
---

# Sigma icon

The Sigma icon shows a capital sigma formed by three horizontal strokes connected by angled sides. Drawn in the line style on a 24px grid with a 1.5px stroke so it stays clear at small sizes. Use it for mathematical notation, summation controls, formulas, statistics, and educational interfaces. It belongs to Ultimate Regular set in the Ultimate family.

## Preview

![Clean line icon of a capital sigma shape with angled sides. Used for math, summation, formulas, and statistics.](https://assets.streamlinehq.com/image/private/w_240,h_240,ar_1/f_auto/v1/icons/streamline-regular/interface-essential/text-formating/sigma-h7n397lt8qgd7dq309hu2.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Sigma
- **Type**: Icon
- **Set**: [Ultimate Regular](/icons/streamline-regular.md) — Icon encyclopedia with every concept. Regular style prioritizes simplicity, adapts to light/dark backgrounds. 
- **Family**: [Ultimate](/icons/ultimate-sets.md) — The encyclopedia of icons
- **Style**: Line, Minimal, Stroke
- **Category**: Interface Essential › Text Formating
- **Default size**: 24px
- **Stroke width**: 1.5px
- **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--9018)

## 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 Bold](/icons/download/sigma--7556.md) (Pro)
- [Sigma — Ultimate Light](/icons/download/sigma--8287.md) (Pro)

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