Source: Noto Sans Symbols 2

U+25EF Large Circle

U+25EF was added in Unicode version 1.1 in 1993. It belongs to the block U+25A0 to U+25FF Geometric Shapes in the U+0000 to U+FFFF Basic Multilingual Plane.

This character is a Other Symbol and is commonly used, that is, in no specific script.

The glyph is not a composition. Its width in East Asian texts is determined by its context. It can be displayed wide or narrow. In bidirectional text it acts as Other Neutral. When changing direction it is not mirrored. If its East Asian Width is “narrow”, U+25EF forms a word with similar characters, which prevents a line break inside it. Otherwise it allows line breaks around it, except in some numeric contexts.

The CLDR project calls this character “large hollow circle” for use in screen reading software. It assigns these additional labels, e.g. for search in emoji pickers: circle, hollow, large, ring.

The Wikipedia has the following information about this codepoint:

O mark is the name of the circle symbol "◯". It is often used in East Asia to express affirmation. Its use is similar to that of the checkmark ("✓") in the Western world. Its opposite is the X mark ("✗" or "×").
The symbol has a variety of names and meanings in various cultures. In Japanese it is called marujirushi (丸印) or maru (丸) and expresses affirmation. In Korean it is called gongpyo (공표; 空標; lit. ball mark) and expresses affirmation.

Representations

System	Representation
Nº	9711
UTF-8	E2 97 AF
UTF-16	25 EF
UTF-32	00 00 25 EF
URL-Quoted	%E2%97%AF
HTML hex reference	◯
Wrong windows-1252 Mojibake	â—¯
HTML named entity	&bigcirc;
HTML named entity	&xcirc;
Encoding: CP932 (hex bytes)	81 FC
Encoding: EUC_JP (hex bytes)	A2 FE
Encoding: EUC_JIS_2004 (hex bytes)	A2 FE
Encoding: EUC_JISX0213 (hex bytes)	A2 FE
Encoding: GB18030 (hex bytes)	81 37 A1 30
Encoding: ISO2022_JP (hex bytes)	1B 24 42 22 7E 1B 28 42
Encoding: ISO2022_JP_1 (hex bytes)	1B 24 42 22 7E 1B 28 42
Encoding: ISO2022_JP_2 (hex bytes)	1B 24 42 22 7E 1B 28 42
Encoding: ISO2022_JP_2004 (hex bytes)	1B 24 42 22 7E 1B 28 42
Encoding: ISO2022_JP_3 (hex bytes)	1B 24 42 22 7E 1B 28 42
Encoding: ISO2022_JP_EXT (hex bytes)	1B 24 42 22 7E 1B 28 42
Encoding: SHIFT_JIS (hex bytes)	81 FC
Encoding: SHIFT_JIS_2004 (hex bytes)	81 FC
Encoding: SHIFT_JISX0213 (hex bytes)	81 FC
L^AT_EX	\bigcirc
Adobe Glyph List	largecircle

Elsewhere

Complete Record

Property	Value
Age (age)	1.1 (1993)
Unicode Name (na)	LARGE CIRCLE
Unicode 1 Name (na1)	—
Block (blk)	Geometric Shapes
General Category (gc)	Other Symbol
Script (sc)	Common
Bidirectional Category (bc)	Other Neutral
Combining Class (ccc)	Not Reordered
Decomposition Type (dt)	none
Decomposition Mapping (dm)	Large Circle
Lowercase (Lower)	✘
Simple Lowercase Mapping (slc)	Large Circle
Lowercase Mapping (lc)	Large Circle
Uppercase (Upper)	✘
Simple Uppercase Mapping (suc)	Large Circle
Uppercase Mapping (uc)	Large Circle
Simple Titlecase Mapping (stc)	Large Circle
Titlecase Mapping (tc)	Large Circle
Case Folding (cf)	Large Circle
ASCII Hex Digit (AHex)	✘
Alphabetic (Alpha)	✘
Bidi Control (Bidi_C)	✘
Bidi Mirrored (Bidi_M)	✘
Composition Exclusion (CE)	✘
Case Ignorable (CI)	✘
Changes When Casefolded (CWCF)	✘
Changes When Casemapped (CWCM)	✘
Changes When NFKC Casefolded (CWKCF)	✘
Changes When Lowercased (CWL)	✘
Changes When Titlecased (CWT)	✘
Changes When Uppercased (CWU)	✘
Cased (Cased)	✘
Full Composition Exclusion (Comp_Ex)	✘
Default Ignorable Code Point (DI)	✘
Dash (Dash)	✘
Deprecated (Dep)	✘
Diacritic (Dia)	✘
Emoji Modifier Base (EBase)	✘
Emoji Component (EComp)	✘
Emoji Modifier (EMod)	✘
Emoji Presentation (EPres)	✘
Emoji (Emoji)	✘
Extender (Ext)	✘
Extended Pictographic (ExtPict)	✘
FC NFKC Closure (FC_NFKC)	Large Circle
Grapheme Cluster Break (GCB)	Any
Grapheme Base (Gr_Base)	✔
Grapheme Extend (Gr_Ext)	✘
Grapheme Link (Gr_Link)	✘
Hex Digit (Hex)	✘
Hyphen (Hyphen)	✘
ID Continue (IDC)	✘
ID Start (IDS)	✘
IDS Binary Operator (IDSB)	✘
IDS Trinary Operator and (IDST)	✘
IDSU (IDSU)	0
ID_Compat_Math_Continue (ID_Compat_Math_Continue)	0
ID_Compat_Math_Start (ID_Compat_Math_Start)	0
Ideographic (Ideo)	✘
InCB (InCB)	None
Indic Mantra Category (InMC)	—
Indic Positional Category (InPC)	NA
Indic Syllabic Category (InSC)	Other
Jamo Short Name (JSN)	—
Join Control (Join_C)	✘
Logical Order Exception (LOE)	✘
Modifier Combining Mark (MCM)	✘
Math (Math)	✘
Noncharacter Code Point (NChar)	✘
NFC Quick Check (NFC_QC)	Yes
NFD Quick Check (NFD_QC)	Yes
NFKC Casefold (NFKC_CF)	Large Circle
NFKC Quick Check (NFKC_QC)	Yes
NFKC_SCF (NFKC_SCF)	Large Circle
NFKD Quick Check (NFKD_QC)	Yes
Other Alphabetic (OAlpha)	✘
Other Default Ignorable Code Point (ODI)	✘
Other Grapheme Extend (OGr_Ext)	✘
Other ID Continue (OIDC)	✘
Other ID Start (OIDS)	✘
Other Lowercase (OLower)	✘
Other Math (OMath)	✘
Other Uppercase (OUpper)	✘
Prepended Concatenation Mark (PCM)	✘
Pattern Syntax (Pat_Syn)	✔
Pattern White Space (Pat_WS)	✘
Quotation Mark (QMark)	✘
Regional Indicator (RI)	✘
Radical (Radical)	✘
Sentence Break (SB)	Other
Soft Dotted (SD)	✘
Sentence Terminal (STerm)	✘
Terminal Punctuation (Term)	✘
Unified Ideograph (UIdeo)	✘
Variation Selector (VS)	✘
Word Break (WB)	Other
White Space (WSpace)	✘
XID Continue (XIDC)	✘
XID Start (XIDS)	✘
Expands On NFC (XO_NFC)	✘
Expands On NFD (XO_NFD)	✘
Expands On NFKC (XO_NFKC)	✘
Expands On NFKD (XO_NFKD)	✘
Bidi Paired Bracket (bpb)	Large Circle
Bidi Paired Bracket Type (bpt)	None
East Asian Width (ea)	ambiguous
Hangul Syllable Type (hst)	Not Applicable
ISO 10646 Comment (isc)	—
Joining Group (jg)	No_Joining_Group
Joining Type (jt)	Non Joining
Line Break (lb)	Ambiguous (Alphabetic or Ideographic)
Numeric Type (nt)	none
Numeric Value (nv)	not a number
Simple Case Folding (scf)	Large Circle
Script Extension (scx)
Vertical Orientation (vo)	U