UK iMac power lead

[g33]

My imac will be delivered today and I wish to drill out a hole so that I can get the power cable through a false back to a wall unit. Can somebody kindly measure the width of the power lead at the imac end for me please? I dont want to go overkill and drill a 100mm diameter hole

 

[JustMartin]

Well, on my late 2012, it's a circle approximately 35mm in diameter.

 

[g33]

Well, on my late 2012, it's a circle approximately 35mm in diameter.

Thanks for that