discourse/app/assets/stylesheets/common/base/groups.scss

.groups {
  .group-header {
    display: table;
  }

  .avatar-flair {
    $size: 40px;

    background-size: $size;
    height: $size;
    width: $size;

    i {
      font-size: $size !important;
    }
  }

  .group-avatar-flair, .group-name {
    display: table-cell;
    vertical-align: middle;
  }
}