Where is the biggest clock?

Tehran 24 ran a photo of a huge clock somewhere in Tehran, under the headline of “The World’s Biggest Clock.”

Huge outdoor clock in Tehran, Iran - credit on photo, Tehran Daily

But is it more than 37 feet across, like the flower clock in Las Colinas, Irving, Texas?*

Las Colinas, in Irving Texas; flower clock - photo Glenn Boyden

What is the biggest clock in the world? Surely there are some bigger.

* This site says the Tehran clock is 15 meters across — bigger than Las Colinas. The clock faces accompanying the bell of Big Ben are 7 meters across. For a panoramic view of the belfry of Big Ben, see the Parliament website.

Wikipedia’s list:

The biggest clock face is a disputed title mainly due to lack of impartial and accurate measurements being widely available, and accepted rules for what qulaifies as a “clock face”. There are three main contenders:

  • The Cevahir Mall clock in Istanbul, which claims to have 3 meter high digits (which based on pictures may make the face as large as 36 meters in diameter).
  • The Colgate Clock which is located on the Jersey City waterfront, and faces Manhattan, which claims a diameter of 50 feet (15.24 meters).[1]
  • The Flower clock, Abbasabad district of Tehran, which claims to measure 49.21 feet (15 meters) in diameter. It weighs in at 750 kg, and was installed on 7 June 2005.[2]

Other big clock faces

3 Responses to Where is the biggest clock?

  1. Derrick says:



  2. Ed Darrell says:

    Didn’t know about it. Helene, it’s not listed in Wikipedia. Why don’t you go to Wikipedia and add the Duquesne Brewery clock to the list?

    Go here to add it:


  3. Helene Milan says:

    You forgot the Duquesne Brewery Clock in Pittsburgh PA measuring at 60 ft in diameter.


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