Leading lifestyle apparel designer and marketer Guess? Inc on Thursday posted a 10.9 per cent fall in January sales to $24.5 million and a 16.9 per cent slump in comparable store sales for the month from the year-ago period.

The firm, which designs, markets, distributes and licenses lifestyle collections of contemporary apparel, accessories and related consumer products, noted that "significantly" reduced inventory levels had meant less promotional activity took place this January than last.