Grid gallery

Hi. I\’m trying to make a grid gallery on my front page. I want the grid gallery to show my pinterest pins, but I dont feel like I have any control over what is shown. If I use the Mosaic grid, the pictures simply go into two columns. If I use the fixed grid, I get cropped versions of the pictures that are in rows and columns. Neither of these is what I want. I want to get some sort of mosaic effect where pictures are NOT cropped, but are resized to my specifications. Since they are pinterest pins their original size are too big (1100×800).

I try to use the image height and width options in your plugin, but it seems to only specify the original size and then stretches it to the same dimensions making them look really blurry and bad.