U+25A3 "▣" White Square Containing Black Small Square Unicode Character

U+25A3 "▣" White Square Containing Black Small Square is a geometric symbol that features a large white square framing a smaller black square at its center, creating a distinct nested or target-like appearance. It belongs to the Miscellaneous Symbols and Dingbats block, where it is often used in visual design, user interfaces, or diagrammatic contexts to denote containment, validation, or a state of being selected or filled. Unlike simpler square symbols, this character combines both outline and fill elements in a single glyph, making it useful for representing a checkbox that is partially or fully completed.