🚾

Unicode gives two alternative forms:

• 🅏 (“SQUARED WC”)
• 🆏 (“NEGATIVE SQUARED WC”)

A blue box with the white text WC (“water closet”); but see usage notes.

🚾︎

1. (chiefly British) Indicates public toilets.
   • 1993, John E. Traister, Illustrated Dictionary for Building Construction, Fairmont Press, →ISBN, Mechanical Graphic Symbols, page 372:

     WC   Water Closet

   • 2015 July 2, “A new symbol for the toilet”, in BBC News‎^[5]:

     Here PC stands for "public convenience", according to maps created by Ordnance Survey (OS), the UK's official mapping agency. Not WC, meaning "water closet", widely in use in cafes, bars, restaurants and so on to denote a toilet.

• In the United Kingdom, where 🚾︎ is predominantly used, it coexists with the more universally-recognisable 🚻︎. Specifically on British informational road signage (as produced by the Department for Transport), 🚾︎ is used in official capacity to indicate public toilets.^[1]
• As an emoji, almost all operating systems display this symbol as a blue box. The unicode character itself and certain operating systems instead display this symbol as a flush toilet (🚽︎) with the text “WC” above it.^[2][3] The character itself was released in Unicode 6.0 in October 2010.^[4]

• 🚻︎ (“marks public toilets”)
• 🚽︎ (“marks unisex toilets”)

• 🚹︎ (“marks a public toilet used by men”)
• 🚺︎ (“marks a public toilet used by women”)

• 🚼︎ (“marks a room that is suitable to change a baby in”)
• 🚿︎ (“marks a public shower”)