---
title: "Sigma Icon | Free Download PNG & SVG | Flex Line"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/sigma--24474
canonical_url: "https://www.streamlinehq.com/icons/download/sigma--24474"
summary: "Rounded line icon of a Greek sigma with angled sides and horizontal bars. Used for math, sums, formulas, and data."
---

# Sigma icon

The Sigma icon shows a Greek sigma formed by horizontal bars joined by angled strokes. Drawn in the line style on a 14px grid with a 1px stroke so its rounded curves stay clear at small sizes. Use it for summation controls, math tools, formulas, statistics, and data analysis interfaces. It belongs to Flex Line set in the Flex family.

## Preview

![Rounded line icon of a Greek sigma with angled sides and horizontal bars. Used for math, sums, formulas, and data.](https://assets.streamlinehq.com/image/private/w_240,h_240,ar_1/f_auto/v1/icons/text-formatting/sigma-id5ndc43p3qsgj5wou8oic.png/sigma-bjpjh41vi6lfnfods2q0k.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Sigma
- **Type**: Icon
- **Set**: [Flex Line](/icons/flex-line.md) — Flex is a fluid icon family inspired by nature's curves. It replaces rigid geometry with smooth, flowing forms. The Line variant features elegant strokes with organic curves.
- **Family**: [Flex](/icons/flex.md) — Fluid icons
- **Style**: Line, Stroke
- **Category**: Interface Essential › Text Formatting
- **Default size**: 14px
- **Stroke width**: 1px
- **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--24474)

## Also available in other styles

- [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)
- [Sigma — Flex Solid](/icons/download/sigma--24314.md) (Pro)

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