how to increase main image size?

Hi,

I use Hikashop Business. I would like to increase my main image on individual product pages to be roughly 400px high and 300px wide. Currently it is 240px high by 400px wide. For the life of me I can't figure out how to make this change, any advice?

Please note I've made minor adjustments. I fixed the .hikashop_product_main_image to be height: 260px !important; (because otherwise I get a large white banner under my shots) and I changed the .hikashop_product_left_part to be width:60%. I may have changed the main image sizing previously but I don't recall how.

Please see this on my product page: notascratch.com/iphone-5/product/279-iphone-5-anatomy

Sorry this is such a pickle. Please help,
Luke

Oh, ignore this. I found it in the front end and removed the fixed height I must have set earlier. Sorted now.