how to reset thumnail size in magento

 

/app/design/frontend/default/contempospace/template/catalog/product/list.phtml

if([category ==male])
<img src=”<?php echo $this->helper(‘catalog/image’)->init($_product,
‘thumbnail’)->resize(250, 250); ?>
else
<img src=”<?php echo $this->helper(‘catalog/image’)->init($_product,
‘small_image’)->resize(300, 250); ?>

if you have created a category namely “male” and you want to resize your thumbnail there as described above (250,250) or whatever size you wish to choose ; secondly whatever left can be customized there as code shown above