WooCommerce Featured Image Issue

Hey All,

I recently installed woocommerce for a client and when adding the feature image it doesnt crop to a thumbnail; instead it is the full size image so you only see a portion of the image, then when you click the featured image it pops up but it has been cropped properly as to not take up the whole screen etc.

Here is the link as an example.
http://www.gear4adventure.com/shop/citori-micro-midas-satin-hunter/
you’ll see other examples once you click the link.

Any assistance would be awesome.

Thanks in advance!

Peace
Phil