| Name | SQUARE MM SQUARED MM |
| Unicode Version | 1.1 |
| Block（ブロック） | CJK Compatibility（CJK互換用文字） |
| 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 | ㎜ e38e9c |
| UTF-16 Encoding | ㎜ 339c |
| UTF-32 Encoding | ㎜ 0000339c |