Testimonials Image style

Hey guys,

Cannot set the round image boxes of the testimonials into squared boxes.

I added this code to Quick CSS but still won’t work:

/* Tamaño imagen de los testimonials
.avia-testimonial-image, .avia-testimonial-image img { width: 200px; height: 89px; }

/* Forma imagen de los testimonials
.avia-testimonial-image {
  border-radius: 0px !important;
}
.avia-testimonial-image img {
  border-radius: 0 !important;
}

I also used a plug-in to regenerate thumbnails, but wasn’t succesful. My desired size is 200 px * 89 px on squared boxes.

Any tips more than welcome, and thanks in advance!