you are facing this issue, it would be my pleasure to help you.
Welcome to the Shopify community!
Please Share your store live url & screenshot where you want to do modification, so that I will solve your issue here!
Store URL ? with password
As I have gone through your store, you have to change your product page.
If you change the size of the image then it will fit only the layout is.
you have to change in the product template liquid.
Hello @ oai_lisa,
You can do this by yourself if you have coding knowledge or hire us we will do this for you. You can email me. my email id is written below.