Hi ibewguy,
You are right. The JA Wall template has the specified image sizes basing on each item grid size. On the Featured Articles/ Category Blog layout of this template, we do use the Masonry jQuery to display the article/item in grid layout view.
The item grid layout can be changed automatically basing on the defined Extended classes (i.e masonry-brick, grid-double, grid-triple …) inside article/K2 item backend. However, the size and number of item grids are divided equally on different device solutions by the integrated Masonry jQuery.
While the image size will depend and limited on/by the size of its item grid. So, in this case we would like you to NOT change the image size on this JA Wall template because you will need to do 2 steps with some riskes:
– Override the item grid of Mansory jQuery. That can make the Featured Articles/ Category Blog layout not display the item grid correctly.
– Override the image size basing on each Extended classes we defined before. I am sure It will take a lot time of you to get the perfect layout with new image size.