Setting DrawRect dimensions in HUD blueprint

I want a fix height for my rectangle what I draw in my HUD blueprint with DrawRect.
I set it to 86, which is in my understanding 86 pixel (Is this correct?).

I also have some UMG blueprint widgets, where I am displaying some images (image size is 176x74). I am displaying this blueprint widget in my HUD blueprint.

The weird thing is that my rectangle is twice as big as my image thought it should be just smaller then with 12 pixels (86 - 74).

What am I doing wrong or what do I misunderstand here?