Unable to change size of product images

So recently I’ve been working on my shopify store and I’ve got to the point where I need to change the size of my product images in the product image and description block , when I started the images were massive so I need them to be smaller however as I use the carousel feature when I make the images smaller both images appear in the first slide , however if I try to adjust the images slightly larger they go back to being way to big.

I’ve tried asking ChatGPT whos suggested multiple different coding options however I’m not comfortable doing this.

If anyone could help that would be much appreciated

Hello thank you for your reply , I believe Ihave gone through all of the settings and options on the product template section unless I’ve missed something?

I’m using the Atelier theme

Okay thank you ! This section ?

I’ll try my best lol here

I’ve used every option under the aspect ratio drop down however this doesn’t seem to change anything? Other then landscape but that makes the images very small

How Will you fix it ?

Have you actually saved then checked it on the frontend to confirm the behavior, or issue isn’t just a editor-preview quirk.
The image sizes shouldn’t matter for when they show flush together like this in a carousel.
This indicates another issue, or settings (e.g. designers made the them this way on purpose).
Or specific image requirements(see theme docs if any) etc