material-ui/docs/src/less/pages/components/paper.less

Material Design UI components built with React

.paper-examples {

  .mui-paper {
    height: 100px;
    width: 100px;
    margin: 0 auto;
    margin-bottom: 64px;
  }

  @media @device-medium {
    .clearfix();

    .paper-examples-group {
      float: left;
      width: 33%;
    }
  }
}