The Fairtrade Foundation said that sales of Fairtrade-certified cotton garments had grown from 500,000 in 2006 to 9.5 million in 2007.
Marks & Spencer, Tesco, Debenhams and Topshop are among the retailers who have launched new Fairtrade clothing collections or special promotions on Fairtrade products to celebrate Fairtrade Fortnight, which starts today and runs until March 9.
Harriet Lamb, executive director of the Fairtrade Foundation said: "The fantastic increase in sales of Fairtrade goods in 2007 shows the UK public's huge and growing appetite for Fairtrade. After years of chipping away, Fairtrade supporters are finally beginning to make some significant impression on the way companies trade. Increasing numbers of people in the UK are buying Fairtrade goods as a practical action everyone can take to help tackle poverty in the developing world."
Fairtrade Fortnight takes place February 25-March 9. More than 10,000 events are expected to take place across the UK to help raise shopper awareness about Fairtrade products.