It's recommended to keep using the justified layout. It respects how the pictures are originally shaped. However, people requested fixed width thumbnails or columns. Well, Justified Image Grid has rows. Moreover, the idea of fixed width is slowly losing its meaning. Why? Because everything is responsive! So, what does this mean? There is a setting that lets you to redefine the aspect ratio of thumbnails. You can automatically crop them to portrait, landscape, or any shape you can think of. For example, you could set a 300px row height and 1:1 aspect ratio. In turn, your images will be squares up to 300px wide and tall. They may shrink or get re-organized due to responsiveness. A setting called "disable cropping" goes hand-in-hand since you might want to always keep the desired aspect ratio.