Graphic Slider Size

Hello all! I have swapped out the image on the graphic slider, but can't figure out a way to increase the size of the image or the slider. Anyone have any experience with this? There are some related posts on this on this forum, but I did not find one that works yet. Thanks in advance! My current code is below -
var imgs = jQuery("#"+this.questionId+" div.SSImage > div.SSImage");
imgs[0].style.background = "url(https://waltonuark.az1.qualtrics.com/ControlPanel/Graphic.php?IM=IM_GyGxAQBU9b6AvHI) no-repeat";
imgs[0].style.padding = '0';