UnicodeCharactercom
𝕀
U+1D564 Β· MATHEMATICAL DOUBLE-STRUCK SMALL S

Mathematical Double-Struck Small S

  • CodepointU+1D564
  • NameMATHEMATICAL DOUBLE-STRUCK SMALL S
  • Decimal120164
  • BlockMathematical Alphanumeric Symbols (U+1D400–U+1D7FF)
  • Plane1 β€” Supplementary Multilingual Plane
  • ScriptCommon
  • CategoryLl β€” Lowercase Letter
  • Unicode version3.1 (2001)
  • Bidi classL β€” Left-to-Right
  • Combining class0
  • East Asian widthN β€” Neutral
  • MirroredNo

About this character

U+1D564 (𝕀) is MATHEMATICAL DOUBLE-STRUCK SMALL S, a lowercase letter in the Mathematical Alphanumeric Symbols block. Its script is Common: it is shared by many writing systems rather than belonging to one. It was added in Unicode 3.1 (2001).

It is a font variant of U+0073 s (compatibility decomposition <font>). NFC and NFD leave it alone, but NFKC and NFKD replace it with U+0073 s. Search engines, identifier checks and username systems that apply NFKC will treat the two as the same text.

How to type 𝕀

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Encodings & escapes

UTF-8 encoder β†’
UTF-8F0 9D 95 A44 bytes
UTF-16D835 DD64surrogate pair
UTF-320001D5644 bytes
HTML named&sopf;named character reference
HTML decimal&#120164;
HTML hex&#x1D564;
CSS\1D564in content: "…"
JavaScript\u{1D564}ES2015+
JavaScript\uD835\uDD64surrogate pair
JSON\uD835\uDD64
Python\U0001D564
Python\N{MATHEMATICAL DOUBLE-STRUCK SMALL S}by name
Java / C#\uD835\uDD64
C / C++\U0001D564universal character name
Rust / Swift / PHP\u{1D564}
Go\U0001D564
Ruby\u{1D564}
Excel / Sheets=UNICHAR(120164)
URL-encoded%F0%9D%95%A4percent-encoded UTF-8
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Normalization forms

Normalizer β†’
NFCunchanged
NFDunchanged
NFKCU+0073 s
NFKDU+0073 s
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Looks similar

Characters that Unicode’s security data (UTS #39 confusables) lists as visually confusable with this one. Useful for spotting lookalike spoofing in URLs and usernames.

U+0073sLatin Small Letter S U+01BDΖ½Latin Small Letter Tone Five U+0455Ρ•Cyrillic Small Letter Dze U+FF53ｓFullwidth Latin Small Letter S U+1D42C𝐬Mathematical Bold Small S U+1D460𝑠Mathematical Italic Small S U+1D494𝒔Mathematical Bold Italic Small S U+1D4C8π“ˆMathematical Script Small S U+1D4FC𝓼Mathematical Bold Script Small S U+1D530𝔰Mathematical Fraktur Small S U+1D598π–˜Mathematical Bold Fraktur Small S U+1D5CCπ—ŒMathematical Sans-Serif Small S U+1D600π˜€Mathematical Sans-Serif Bold Small S U+1D634𝘴Mathematical Sans-Serif Italic Small S U+1D668𝙨Mathematical Sans-Serif Bold Italic Small S U+1D69C𝚜Mathematical Monospace Small S
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Nearby in Mathematical Alphanumeric Symbols

All in block β†’
U+1D55Eπ•žMathematical Double-Struck Small M U+1D55Fπ•ŸMathematical Double-Struck Small N U+1D560𝕠Mathematical Double-Struck Small O U+1D561𝕑Mathematical Double-Struck Small P U+1D562𝕒Mathematical Double-Struck Small Q U+1D563𝕣Mathematical Double-Struck Small R U+1D565π•₯Mathematical Double-Struck Small T U+1D566𝕦Mathematical Double-Struck Small U U+1D567𝕧Mathematical Double-Struck Small V U+1D568𝕨Mathematical Double-Struck Small W U+1D569𝕩Mathematical Double-Struck Small X U+1D56Aπ•ͺMathematical Double-Struck Small Y