Idea of Tick Box Icon
This is a checkmark inside of a square with rounded corners. The square has four normal sides and three normal corners, but the top-right corner is open. The checkmark's tail would meet the top right corner if the square was complete.
This is the Tick Box 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.