In particular, their popularity may be attributed to the influence of singers such as Andy Williams and Val Doonican, who appeared in these type of jumpers in their television Christmas specials.

[10] In 2012, the British newspaper The Daily Telegraph described them as "this season's must have",[8] with retailer Topman selling 34 different designs alone and reporting sales had increased 54% compared to 2011.

[8] Higher end fashion labels have also produced Christmas jumpers, including Burberry and Jil Sander,[8] and even metal band Slayer released one as part of their merchandise range.

[11] The charity Save the Children runs an annual Christmas Jumper Day each year in December using the slogan "Make the world better with a sweater".

[12] The New York Times reported in 2012 that a major venue for sweater sales are independent company websites, with ugly-sweater themed names.