img.post-thimb:before {
content: " ";
display: block;
position: relative;
top: 25px;
left: 0;
height: 200px;
width: 100%;
background-color: rgb(255, 255, 255);
border: 1px dashed rgb(200, 200, 200);
border-radius: 5px;
background-image: url(/wp-content/uploads/2016/01/1111-100x100.jpeg);
background-repeat: no-repeat;
background-position: 50%;
}