Image sizing

I want to increase the size of my product image on the product page. I have set my image proportions in System > Configuration > Image to 720x720 and have tried using all resizing/cropping options, however I cannot get the image resolution to be any larger than 390px wide.

43.241.54.236/~finncoldpress/cleanses/our-signature-cleanse

Is there something I have overlooked?

Many thanks,
Tony.

Hello Tony,

Actually, the image can be resized to bigger size. However, the space in the product details page is not enough to display it.

Please submit a new ticket to send me the super admin account to your site so I can help you to check and make it display properly for you.

Hope to hear back from you soon.

Sincerely, Giang