Decreasing paper size [closed]

I'm doing a print with css print on the bematech MP-4200 TH printer, my content is in a good size customized by css, but I would like to reduce the size of the paper because it's leaving a very large space at the time.

I was seeing the setting in Chrome and the paper size in the print is 80mm wide.

How can I decrease the paper size in the printout?

My css in print:

@media print {
    @page {          
        margin: 0;
    }

        html, body {
            width: 210mm;
            height: 100mm;
            margin:0px;
        }

        .pagina {
            margin: 0;
            border: initial;
            border-radius: initial;
            width: initial;
            min-height: initial;
            box-shadow: initial;
            background: initial;
            page-break-after: always;
        }

        /*body {
            background: #fff;
            width: 302px;
            height: 300px;
        }*/

        h2 {
            page-break-before: always;
        }

        h3, h4 {
            page-break-after: avoid;
        }

        pre, blockquote {
            page-break-inside: avoid;
        }

        .modal-dialog .modal-content {
            border: none;
        }

        .print {
            display: none;
        }

        #minhaTabela_wrapper {
            display: none;
        }

    #myModal {
        width: 110mm;
        height: 100mm;
        border: none;
        margin-left: 1px;
        margin-top: -15px;

    }

        #imprimir {
            margin-top: -30px;

        }   

    .text-print {
        float: left;
        font-size: 10px;
        font-family: Arial;

    }

    .input-print {
        border: none;
        font-family: Arial;
        font-size: 12px;
        width: 110px;
        float:left;
        margin-top: -11px;
    }

        .modal-header {
            border: none;
        }

        #codBarras {
            display: inline;
        }

        h4 {
            font-size: 10px;
        }

        .dataTables_wrapper .dataTables_length, .dataTables_wrapper .dataTables_filter, .dataTables_wrapper .dataTables_info, .dataTables_wrapper .dataTables_processing, .dataTables_wrapper .dataTables_paginate {
            display: none !important;
        }

    .larg {
        width:150px;
    }
    }