Make WooCommerce product images flush

Hi

I want to make the product images on my woocommerce site flush with each other so they're all a consistent size.

Please check http://jumbo.becreativ.co.uk

I'm assuming there'll be some sort of CSS code to do this but can you help me with what it might be please.

Also, is there a free way to migrate products from opencart in to woocommerce - i've checked cart2cart out but if there's a better option, i'm all ears :slight_smile:

Thanks
Farzan