Listing Images in grid with same Size in Magento

If you want to display Images in Same Size in grid in List page use Following Code

helper('catalog/image')->init($_product, 'small_image')
->constrainOnly(TRUE)
->keepAspectRatio(TRUE)
->keepFrame(FALSE)
->resize(135,135)?>
in list.phtml file for images

Good day

RegardsDarshan Dodiya