U+3377 "㍷" Square Dm Unicode Character
U+3377 "㍷" Square Dm is a precomposed CJK compatibility ideograph representing the unit of measurement "dm," which stands for decimeter, one tenth of a meter. Part of the CJK Compatibility block, this square character is designed for vertical text layouts in East Asian typography, where it condenses the two Latin letters into a single width unit for consistent alignment. Its primary use is in contexts requiring compact numeric expressions, such as technical diagrams, engineering documents, or educational materials, allowing for efficient notation of small lengths. While it was originally included in Unicode to maintain roundtrip compatibility with older character encodings like Shift JIS, it is now considered a legacy compatibility character that duplicates the function of standard Latin letter sequences.
General Properties
| Code Point | U+3377 |
| Version Added | 4.0 |
| Name | Square Dm |
| Block | CJK Compatibility |
| General Category | Other Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
| Decomposition Type | Square |
| Decomposition Mapping | "d" U+0064 Latin Small Letter D "m" U+006D Latin Small Letter M |
Encodings
| HTML Decimal Encoding | ㍷ |
| HTML Hex Encoding | ㍷ |
| UTF-8 Encoding | 0xE3 0x8D 0xB7 |
| UTF-16 Encoding | 0x3377 |
| UTF-32 Encoding | 0x00003377 |
| C/C++/Java Escape | \u3377 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Ideographic |
| East Asian Width | Wide |
| Changes When NFKC Casefolded | Yes |
| NFKC Casefold | "d" U+0064 Latin Small Letter D "m" U+006D Latin Small Letter M |
| NFKC Simple Casefold | "d" U+0064 Latin Small Letter D "m" U+006D Latin Small Letter M |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |