.entry-content img,
.item img {
     width: 80%;
    height: auto;
    display: block;
    max-width:300px;
    height: auto;
    border-radius: 10px;
    border: 3px solid;
    box-shadow: 5px 5px 15px rgba(0, 0, 0, 0.2);
    display: block;
    margin: 10px auto;
}
.mon-plugin-class {
    display: block;
}