| Name | SQUARE IMAGE OF OR EQUAL TO |
| Unicode Version | 1.1 |
| Block（ブロック） | Mathematical Operators（数学記号） |
| Plane（面） | Basic Multilingual Plane（基本多言語面） |
| Script | |
| Category | |
| Bidirectional Class | |
| Combining Class | |
| Character is Mirrored | |
| HTML Entity | ⊑ ⊑ |
| UTF-8 Encoding | ⊑ e28a91 |
| UTF-16 Encoding | ⊑ 2291 |
| UTF-32 Encoding | ⊑ 00002291 |