How to change size of Activity icon in the Activity page while using Edwiser RemUI Card Layout in a course

Please find the CSS for editing the Icon Size on the Activity page. Add the CSS in Edwiser RemUI setting > General setting > Custom CSS section

For Moodle 4.0 and above:

body#page-course-view-remuiformat .activityiconcontainer {
height: 40px;
width: 40px;}

body#page-course-view-remuiformat li.activity img.activityicon {
height: 20px !important;
width: 20px !important;}

For Moodle 3.11 and below:
#page-course-view-remuiformat .wdm-section-wrapper .single-card-container .single-card .wdm-single-activity-title.nosummary img {
    height: 100px;
    width: 100px;
}

Note: This is applicable only when you have not added a description to the activity.