U+FF4F "ｏ" Fullwidth Latin Small Letter O Unicode Character
U+FF4F "ｏ" Fullwidth Latin Small Letter O is a typographic variant of the standard lowercase "o" that occupies a full character width in East Asian text layouts, often used to achieve visual uniformity alongside CJK (Chinese, Japanese, and Korean) characters, which are also fullwidth. It is part of the Halfwidth and Fullwidth Forms block and is encoded for compatibility with legacy character sets, such as Shift JIS, where it matches the vertical positioning and spacing of monospaced or ideographic scripts. In practice, this character appears in digital environments where proportional Latin letters would disrupt the alignment of blocks of text, such as in terminal emulators, early computer games, or formatted documents that require consistent character cell dimensions.
General Properties
| Code Point | U+FF4F |
| Version Added | 1.1 |
| Name | Fullwidth Latin Small Letter O |
| Block | Halfwidth and Fullwidth Forms |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Wide |
| Decomposition Mapping | "o" U+006F Latin Small Letter O |
Encodings
| HTML Decimal Encoding | ｏ |
| HTML Hex Encoding | ｏ |
| UTF-8 Encoding | 0xEF 0xBD 0x8F |
| UTF-16 Encoding | 0xFF4F |
| UTF-32 Encoding | 0x0000FF4F |
| C/C++/Java Escape | \uff4f |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Ideographic |
| East Asian Width | Fullwidth |
| Lowercase | Yes |
| Simple Uppercase Code Point | "Ｏ" U+FF2F Fullwidth Latin Capital Letter O |
| Simple Titlecase Code Point | "Ｏ" U+FF2F Fullwidth Latin Capital Letter O |
| Uppercase Code Point | "Ｏ" U+FF2F Fullwidth Latin Capital Letter O |
| Titlecase Code Point | "Ｏ" U+FF2F Fullwidth Latin Capital Letter O |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When NFKC Casefolded | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| NFKC Casefold | "o" U+006F Latin Small Letter O |
| NFKC Simple Casefold | "o" U+006F Latin Small Letter O |
| Script | Latin |
| Script Extensions | Latin |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Lower |