Change image and price based on selection

Hi guys,

I need you help. I am trying to find a way (I guess an extension is the easiest) to implement the following behavior:
The user selects from a dropdown list the product dimensions, the price is automatically changed as well as the main product image.
Here is an exact example:
https://aquaforestaquarium.com/collecti ... DrZeWACFU8

Is there any extension that I could use?
Any help will be highly appreciated !
Thank you !

You can search on marketplace for Image swap, live price update...
Some are free some are paid