Glyph for U+2317 VIEWDATA SQUARE. According to the standard ITU-T E.161 issued by the International Telecommunication Union, the overshoot of the eight ends regarding to the basic square have to be between 8% abd 18% of the total symbol width. In this glyph, the overshoot is an intermediate 12.5%.
Own work
This  vector image was created with a text editor by Karl432.