Online cross-border trade seen growing fivefold by 2020-study

* Britain seen with biggest online trade surplus of $1 bln

* eBay, Amazon, Zalando, ASOS leaders at pure e-commerce

* Sweden's IKEA, H&M exploiting online to grow faster

BERLIN, Jan 20 (Reuters) - The value of online exports in six of the top e-commerce markets will grow fivefold to $130 billion by 2020, with Britain currently generating the biggest online trade surplus by selling more goods abroad, research showed on Monday.

The study by London-based management consultancy OC&C and U.S. search engine Google GOOG.O estimated the value of cross-border online trade in the United States, Britain, Germany, the Nordics, the Netherlands and France at $25 billion for 2013.

E-commerce is expanding at breakneck pace, with online retail sales in Europe seen doubling by 2018 to 323 billion euros ($437.91 billion), market research firm Mintel forecasts.

News Search ID:nL6N0GG283

"Over the next decade, online retail will become even more international. This represents a great opportunity for retailers by providing a new, capital-light approach to grow rapidly," OC&C partner Anita Balchandani said in a statement.

Britain, the most advanced e-commerce market in the world, generated the biggest online trade surplus in 2013 of more than $1 billion, OC&C estimated, followed by the United States with a surplus of $180 million and Germany on $35 million.

While OC&C said U.S. online pioneers eBay EBAY.O and Amazon AMZN.O were the top international players in pure e-commerce, German online fashion retailer Zalando and British rival ASOS ASOS.L were next in their ranking.

ASOS said on Jan. 14 that retail sales rose 38 percent to 335.7 million pounds in the four months to Dec. 31, helped by a jump of 69 percent in Europe even as growth in the United States and Australia slowed. News Search ID:nL6N0KO0IO

Swedish furniture retailer IKEA Href="NewsSearch">IKEA.UL topped the OC&C ranking of traditional players using e-commerce to speed their international expansion, followed by fashion retailer H&M

HMb.ST and U.S. cosmetics seller Avon Products Inc AVP.N .

German sportswear maker Adidas ADSGn.DE led the OC&C ranking of brands which have used e-commerce to build their international standing, followed by France's Louis Vuitton

LVMH.PA and Hermes HRMS.PA , and Britain's Burberry . ($1 = 0.7376 euros)

(Reporting by Emma Thomasson; Editing by Louise Heavens)

((+49 30 2888 5081)(Reuters Messaging: emma.thomasson.thomsonreuters.com@reuters.net))

Keywords: RETAIL/ONLINE