U+25AA BLACK SMALL SQUARE

The Unicode character U+25AA, officially named BLACK SMALL SQUARE, was introduced in Unicode version 1.1. It is part of the Geometric Shapes block, which belongs to the Basic Multilingual plane.

Categorized technically as a Other Symbol, this character typically falls under the Common script. In terms of text layout and rendering, the glyph is not a composition and has no designated width in East Asian typography. When placed in bidirectional text, it behaves as an Other Neutral character. Its visual representation remains not mirrored regardless of the reading direction.

As an officially designated emoji, this character can be displayed in colorful graphical formats on supported platforms. To explicitly request the colorful emoji presentation rather than a standard monochrome text symbol, developers can append the Variation Selector-16 (U+FE0F) directly after the character.