Idea of Barcode Icon
There are nine vertical bars placed next to each other with spaces between each of them. The bars are of varying thickness and form a rectangular shape. The order is narrow bar, slightly thicker bar, thick bar, narrow bar, slightly thicker bar, narrow bar, slightly thicker bar, narrow bar, narrow bar.
This page shows the different variations of the Barcode from an Icons8 icon pack. Feel free to resize and recolor the icon, and then download the icon in PNG format for free.