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 is the Prison icon for Windows 10
. Here we go. Optimized for 32x32 px, these are the simplest icons in the line style. Downloadable formats are PNG and SVG, among others. Icons8 icon pack is unique in providing a huge number of icons designed by the same team of four designers who create the new icons every working day in the same style and with the same quality. Same cool as the Bat Face, huh.