Woocommerce product image thumbnails

Hello, I started adding products to my site and I notice that the thumbnails on my site aren’t being fully displayed. The image is being cut off instead of resized to show the complete image. However the catalog image displays fully and the light box image. I’m not sure if I need to change something in the css file or a php file to fix this. If you go to http://framesplusmore.com/shop/ you will see that some of the images are being cut off but if you click on them to go to specific product page the image displays fully. Any help is greatly appreciated.

https://wordpress.org/plugins/woocommerce/