U+FF38 "Ｘ" Fullwidth Latin Capital Letter X Unicode Character

U+FF38 "Ｘ" Fullwidth Latin Capital Letter X is a typographic variant of the standard Latin letter X, designed to occupy the same width as a CJK (Chinese, Japanese, and Korean) character in monospaced or East Asian fonts, where it appears as a full-width glyph rather than the narrower half-width form used in typical Latin text. It is part of the Halfwidth and Fullwidth Forms block in Unicode and is commonly utilized in contexts like typewriter-style formatting, terminal interfaces, or mixed-script environments to ensure uniform character spacing in East Asian writing systems.

General Properties

Code Point	U+FF38
Version Added	1.1
Name	Fullwidth Latin Capital Letter X
Block	Halfwidth and Fullwidth Forms
General Category	Uppercase Letter
Canonical Combining Class	Not Reordered
Bidirectional Class	Left To Right
Decomposition Type	Wide
Decomposition Mapping	"X" U+0058 Latin Capital Letter X

Encodings

HTML Decimal Encoding	Ｘ
HTML Hex Encoding	Ｘ
UTF-8 Encoding	0xEF 0xBC 0xB8
UTF-16 Encoding	0xFF38
UTF-32 Encoding	0x0000FF38
C/C++/Java Escape	\uff38

Unicode Properties

NFC Quick Check	Yes
NFD Quick Check	Yes
Numeric Type	None
Numeric Value	NaN
Line Break	Ideographic
East Asian Width	Fullwidth
Uppercase	Yes
Simple Lowercase Code Point	"ｘ" U+FF58 Fullwidth Latin Small Letter X
Lowercase Code Point	"ｘ" U+FF58 Fullwidth Latin Small Letter X
Simple Case Folding	"ｘ" U+FF58 Fullwidth Latin Small Letter X
Case Folding	"ｘ" U+FF58 Fullwidth Latin Small Letter X
Cased	Yes
Changes When Casefolded	Yes
Changes When Casemapped	Yes
Changes When Lowercased	Yes
Changes When NFKC Casefolded	Yes
NFKC Casefold	"x" U+0078 Latin Small Letter X
NFKC Simple Casefold	"x" U+0078 Latin Small Letter X
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	Upper