Product image size

[gofer123]

Hi,
I've gone through the forum but can't find the answer.
As standard, when you click on the product thumbnail a lightbox window pops up, I'm trying to work out how to have a larger product image than what is used at the moment. I'm using VM2 and Joomla 2.5.
Thanks in advance.

[gofer123]

If I could just add to my previous post, is it possible to have something like this:  http://www.aqualineswim.co.nz/default/extreme.html   with sliding bar for resizing.