---
title: "Sigma Icon | Free Download PNG & SVG | Flex Solid"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/sigma--24314
canonical_url: "https://www.streamlinehq.com/icons/download/sigma--24314"
summary: "Rounded solid icon of a thick Greek sigma symbol. Used for math, summation, formulas, and statistics."
---

# Sigma icon

The Sigma icon shows a thick Greek sigma symbol with broad horizontal bars and a central angled curve. Drawn in the solid style on a 14px grid so its rounded form stays clear at small sizes. Use it for mathematical notation, summation tools, formulas, statistics, and education interfaces. It belongs to Flex Solid set in the Flex family.

## Preview

![Rounded solid icon of a thick Greek 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-6e1yky7l2gsjme4icu6cjo.png/sigma-eao6v2px6b5ufpw33uqsre.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Sigma
- **Type**: Icon
- **Set**: [Flex Solid](/icons/flex-solid-style.md) — Flex is a fluid icon family inspired by nature's curves. The Solid variant features smooth, filled shapes with rounded edges for a friendly, organic aesthetic.
- **Family**: [Flex](/icons/flex.md) — Fluid icons
- **Style**: Solid, Bold, Glyph
- **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--24314)

## 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 Flat](/icons/download/sigma--24684.md) (Pro)
- [Sigma — Flex Neon](/icons/download/sigma--30421.md) (Pro)
- [Sigma — Flex Pop](/icons/download/sigma--31308.md) (Pro)

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