Cardinal Keith O'Brien, leader of the Roman Catholic Church in Scotland, presented the St Ninian's Day Tartan garment to the Pontiff, with images of him wearing it soon beamed around the globe.
The Cardinal had 'hidden scarves in his own cassock' before bestowing one upon the Pope for his journey through Edinburgh.
Manufacturer Ingles Buchan revealed phones have been ringing off the hook ever since.
'Since Pope Benedict was seen wearing the tartan during his visit on Thursday, demand has gone through the roof,' confirmed managing director Colin Brown.
The tartan was designed by Matthew Newsome, who travelled from the US to attend last week's official unveiling at the Scottish Parliament.
Newsome, director of the Scottish Tartans Museum in Franklin, North Carolina, explained that he drew on Roman Catholic and Scottish history for the blue, white, green, red and yellow creation.
The Pope's tour of Edinburgh coincided with St Ninian's Day, which celebrates the first man to be named a saint in Scotland in nearly 1,600 years.
The tartan was created in conjunction with Ingles Buchan of Glasgow and ClanItalia of Falkirk.
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