Zumiez Inc. said its comparable store sales decreased 12.3% for the five-week period ended Jan. 3, 2009, versus a comparable store sales increase of 3.9% in the year ago period ended Jan. 5, 2008. Total net sales for the five-week period ended Jan. 3, 2009 decreased 0.1% to approximately $72.0 million, compared to approximately $72.0 million for the five-week period ended Jan. 5, 2008.