Hi Bartosz,

I use Hydra theme :

As you can see, there is a lot of different image size on the home page.
Each picture of the home page are defined in different projects. You can define the size of each project . Ex : 8*4, 6*3, 6*4, 6*6 , …

So, in my upload directory, some of my pictures are registered in different sizes : full, 1920*960, 1920*640, 960*640, …

That’s why my images sizes are doubled.