Images not displaying as I want them

I’m just starting to add images to my products

http://markbowdenhypnotherapy.co.uk/products/page/2/

As you can see part way down the image for ‘increase your appetite’ is higher than the rest and does not fit properly. If you go into the product itself the same image displays perfectly.

The image I am using is 300*300

Any ideas how I make the page long okay on the products page?

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