This is the Hashtag duży 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.
The icon for "hashtag large" is a large pound or number symbol. There are two lines running horizontally, stacked one on top of the other. Intersecting these two lines are two vertical lines, also equidistant from one another. The resulting image has a square at its center.