Idea of Prison Icon
A prison symbol consists of two horizontal lines and two vertical lines that run into each other, similar to a tic-tact toe board. Where the two lines meet, there will be another little line to show that the bars are tightly sealed. A prison is where prisoners are locked away, and would usually have metal bars to keep them inside.
This Prison icon is made in Material Design style
developed by Google. This style is based on extremely simplified shapes, thin two-pixel lines, and is optimized for 24x24 px. Unlike other vector icon packs that have merely hundreds of icons, this icon pack contains 6,200 icons, all in the same style and quality.