salix/print/templates/reports/item-label-barcode/options.json

{
    "width": "10.4cm",
    "height": "4.9cm",
    "margin": {
        "top": "0.17cm",
        "right": "0.745cm",
        "bottom": "0cm",
        "left": "0cm"
    },
    "printBackground": true
}