Square Mm
U+339CCJK Compatibility
Copy and paste ㎜. The Square Mm character has Unicode code point U+339C and decimal HTML code ㎜.
Symbol codes
- Unicode
U+339C- HTML Code
㎜- CSS Code
\339C- HEX Code
㎜
Technical properties
Unicode 18.0.0
- Code point
- U+339C
- Decimal
- 13212
- Unicode name
- SQUARE MM
- Block
- CJK Compatibility · U+3300–U+33FF
- General category
- Other Symbol (So)
- Script
- Common
- Introduced
- Unicode 1.1
- JavaScript
- "\u339C"
Appears in
About Square Mm
㎜ is encoded in Unicode as code point U+339C (decimal 13212). Its official Unicode name is SQUARE MM.
It belongs to the CJK Compatibility block (U+3300–U+33FF), its General Category is Other Symbol (So), and it was added in Unicode 1.1, released in 1993. Its script value is Common: it is shared across writing systems rather than belonging to one.
Sources: Unicode Character Database 18.0.0.
How to type or insert Square Mm
- Any device
- Select Copy symbol, then paste with Ctrl+V, or ⌘+V on a Mac.
- Microsoft Word
- Type
339C, then press Alt+X. - macOS Character Viewer
- Press Control+⌘+Space and search for “square mm”.
- Linux (GTK and IBus)
- Press Ctrl+Shift+U, type
339c, then press Space. - HTML
㎜. In a UTF-8 page you can also paste the character itself.- CSS
content: "\339C";in a::beforeor::afterrule.- JavaScript
"\u339C"
Common questions about Square Mm
What is the Square Mm symbol?
㎜ (Square Mm) is a symbol in Unicode’s CJK Compatibility block. Its code point is U+339C, and it has been part of the standard since Unicode 1.1 (1993).
How do I copy and paste the Square Mm symbol?
Select Copy symbol at the top of this page, then paste with Ctrl+V on Windows and Linux or ⌘+V on a Mac. On a phone, tap Copy symbol, then touch and hold where you want it and choose Paste. ㎜ pastes as ordinary text, so it works in documents, messages, and code.
How do I type the Square Mm symbol on Windows?
In Microsoft Word, type 339C and press Alt+X to turn the code into ㎜. In any app, open Character Map from the Start menu, search for “square mm”, then select and copy the character.
How do I type the Square Mm symbol on a Mac?
Press Control+⌘+Space to open the Character Viewer, search for “square mm”, and double-click the result to insert it.
How do I type the Square Mm symbol on an iPhone or Android phone?
The simplest way is to copy it from this page and paste it where you need it. If you use it often, save it as a text shortcut: on iPhone, go to Settings > General > Keyboard > Text Replacement; with Gboard on Android, go to Gboard settings > Dictionary > Personal dictionary.
Can I use the Square Mm symbol in Word, Google Docs, and social media?
Yes. ㎜ is a standard Unicode character, so you can paste it into Microsoft Word, Google Docs, emails, and posts or bios on Instagram, X, Facebook, and TikTok. In Google Docs you can also choose Insert > Special characters and search for “square mm”. In Word, choose Insert > Symbol > More Symbols, set from to Unicode (hex), and enter 339C as the character code.
Is the Square Mm symbol an emoji?
No. ㎜ is a text symbol, not an emoji. It takes the color and size of the surrounding text, and its exact shape depends on the font.
Why does the Square Mm symbol show as a box or question mark?
An empty box or a question mark means the font on that device has no glyph for ㎜. The character is still there: it appears correctly wherever a font covers Unicode’s CJK Compatibility block, and free font families such as Google Noto cover nearly all of Unicode.
What are the HTML and CSS codes for the Square Mm symbol?
In HTML, write ㎜ (decimal) or ㎜ (hexadecimal). In CSS, use content: "\339C"; in a ::before or ::after rule, and in JavaScript "\u339C". See all HTML codes.