How can I achieve consistent product image sizing for my posters?

[atlasandorigin]

Hi! I sell posters and my mock up up the frames show horizontal and vertical. I cannot seem to get a horizontal and vertical product to look like similar sizing. I attached what I have after messing around with the sizing then I attached another image of what I am going for. I'm also using the paid theme "testament"

 

 

[zaczee]

HI @atlasandorigin 

Can you share your store url

[PMike]

You can check your theme's settings
Go to Customize -> Theme setting -> Product Grid
then you can adjust the image to the size you want.
You also need to check the original image size, if the image size is too large, the theme will automatically adjust to the appropriate size.
Or you can also use applications that allow to maximize images.
Besides, you can edit the theme code