In this article, we have studied the change in bubble size distribution in wet foam with ageing. Using microscope images, we have estimated the Sauter mean size of the bubbles in wet foam, at specific time intervals, over a duration of 24 h. The bubble size distribution has been estimated from each image frame for the entire time scale. A possible way of analyzing such distributions in bubble size, statistically, is proposed and discussed. (C) 2008 Elsevier Ltd. All rights reserved.