[Tinsley1H]

Hello, DylanMateo
You can do this in CSS. However, you'll be resizing a smaller image so there can be some artifacting. Browsers aren't the best at resizing images.

Visit your site. Turn on Edit Site. Click Style in the Site Builder Menu. Then select the CSS Editor tab. Enter in the code below, adjust as needed.

Code:
.b-userinfo .b-avatar, .b-userinfo .b-avatar img {
max-height: 128px;
max-width: 128px !important;
width: 128px;
height: 128px;
}