---
title: "Sigma Icon | Free Download PNG & SVG | Flex Flat"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/sigma--24684
canonical_url: "https://www.streamlinehq.com/icons/download/sigma--24684"
summary: "Rounded flat icon of a thick zigzag sigma symbol. Used for math, summation, formulas, and statistics."
---

# Sigma icon

The Sigma icon shows a thick, rounded zigzag symbol with horizontal top and bottom bars. Drawn in the flat style on a 14px grid, its smooth curves keep the form fluid and clear. Use it for mathematics, summation functions, formulas, statistics, and academic interfaces. It belongs to Flex Flat set in the Flex family.

## Preview

![Rounded flat icon of a thick zigzag sigma symbol. Used for math, summation, formulas, and statistics.](https://assets.streamlinehq.com/image/private/w_240,h_240,ar_1/f_auto/v1/icons/text-formatting/sigma-uj1mttczwncawudoh45nvo.png/sigma-ty5604cq8kql5zcfqbitd.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Sigma
- **Type**: Icon
- **Set**: [Flex Flat](/icons/flex-flat-style.md) — Flex is all about the curves. Its smooth curves brings fluidity and dynamism to your designs with a modern appeal. The Flat style is easy to integrate into projects that need icons with a more illustrative purpose, working best at larger sizes. All Flex Flat icons are designed on a 14px grid with two customizable colors.
- **Family**: [Flex](/icons/flex.md) — Fluid icons
- **Style**: Flat
- **Category**: Interface Essential › Text Formatting
- **Default size**: 14px
- **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, formula, text, format, formatting, symbol, lineart, outline, shape, waveform, zigzagline, zigzag, jagged, sharp, electricity

## Download

- [Download Sigma on Streamline](https://www.streamlinehq.com/icons/download/sigma--24684)

## Also available in other styles

- [Sigma — Flex Line](/icons/download/sigma--24474.md) (Pro)
- [Sigma — Flex Duo](/icons/download/sigma--24523.md) (Pro)
- [Sigma — Flex Remix](/icons/download/sigma--28549.md) (Pro)
- [Sigma — Flex Gradient](/icons/download/sigma--27674.md) (Pro)
- [Sigma — Flex Neon](/icons/download/sigma--30421.md) (Pro)
- [Sigma — Flex Pop](/icons/download/sigma--31308.md) (Pro)
- [Sigma — Flex Solid](/icons/download/sigma--24314.md) (Pro)

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