Setting my product's main image to the same size as others

Hello. I have my product page on desktop looking like this (As you can see, the first image is bigger than the rest)

And I want it all to be the same size, make the first image fit in the image grid. I hope I was clear enough.

Thank you for any help, in advance :slightly_smiling_face:

Hi,

If you send me your website link I can try to help!

Terence.