U+FF42 "ｂ" Fullwidth Latin Small Letter B Unicode Character
U+FF42 "ｂ" Fullwidth Latin Small Letter B is a typographic variant of the standard Latin letter "b," designed to occupy the same horizontal space as a CJK (Chinese, Japanese, and Korean) ideograph in monospaced and East Asian typographic contexts. It belongs to the Halfwidth and Fullwidth Forms block, where it is encoded to allow for consistent alignment in mixed-script text, such as when Latin letters appear alongside fullwidth Japanese characters. Visually, it is identical in shape to a standard "b" but is proportionally wider, matching the fixed width of East Asian characters. This character is used primarily in computer systems and fonts that need to render Latin letters in a fullwidth format for layouts requiring uniform character spacing.
General Properties
| Code Point | U+FF42 |
| Version Added | 1.1 |
| Name | Fullwidth Latin Small Letter B |
| Block | Halfwidth and Fullwidth Forms |
| General Category | Lowercase Letter |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Left To Right |
| Decomposition Type | Wide |
| Decomposition Mapping | "b" U+0062 Latin Small Letter B |
Encodings
| HTML Decimal Encoding | ｂ |
| HTML Hex Encoding | ｂ |
| UTF-8 Encoding | 0xEF 0xBD 0x82 |
| UTF-16 Encoding | 0xFF42 |
| UTF-32 Encoding | 0x0000FF42 |
| C/C++/Java Escape | \uff42 |
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 | "Ｂ" U+FF22 Fullwidth Latin Capital Letter B |
| Simple Titlecase Code Point | "Ｂ" U+FF22 Fullwidth Latin Capital Letter B |
| Uppercase Code Point | "Ｂ" U+FF22 Fullwidth Latin Capital Letter B |
| Titlecase Code Point | "Ｂ" U+FF22 Fullwidth Latin Capital Letter B |
| Cased | Yes |
| Changes When Casemapped | Yes |
| Changes When NFKC Casefolded | Yes |
| Changes When Titlecased | Yes |
| Changes When Uppercased | Yes |
| NFKC Casefold | "b" U+0062 Latin Small Letter B |
| NFKC Simple Casefold | "b" U+0062 Latin Small Letter B |
| Script | Latin |
| Script Extensions | Latin |
| Indic Syllabic Category | Other |
| ID Start | Yes |
| XID Start | Yes |
| ID Continue | Yes |
| XID Continue | Yes |
| Alphabetic | Yes |
| Hex Digit | Yes |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Alphabetic letter |
| Sentence Break | Lower |