Add a number before Product Name

To add a number before Products like this

You can use this code to Custom CSS box

/* Products Number */
.list-grid {
    counter-reset: css-counter 0;
    list-style-type: none;
}
div.grid-item {
    counter-increment: css-counter 1;
}
.grid-title::before {
    content : counter(css-counter) '. ';
}