Third quarter profit at plastic clog manufacturer Crocs Inc has soared by 163% on surging sales and international expansion.

For the three months to 30 September, net income rose to US$56.5m, compared to $21.5m during the prior year period.

Revenues for the quarter climbed 130% to $256.3m, as the footwear firm increased it full-year guidance.

The company now projects revenues to range from $820m to $830m and net income per diluted common share of between $1.94 and $1.98 for FY 2007.

Ron Snyder, president and CEO of Crocs, said: "Our year-to-date performance has been marked by significant gains in sales and earnings, robust international expansion, a number of high-profile licensing agreements, and the continued build out of our global infrastructure."

The company has opened a new 320,000 square foot European distribution facility, it added.

Shares fell 30% in trading, however, after analysts had expected a stonger forecast.