Change width of category image

Hi we are trying to increase the css value for the category image to take the width from 32px to 150px. We have added a width value to the style in but this is being overridden. Can you advise what the appropriate css file is to change this value in?

Hi Tanvir website is https://coventrydbe.org/resources/ – logo is in the section Christian Worldviews and Advocacy Project

Thanks for the css change – perfect job! If anyone else needs to do this put the following into the Additional CSS in Customise the Theme:

.w3eden .category-icon{
max-width: 50% !important;
width: 512px !important;
}