A 60 cm DTF gang sheet is a 600 mm printable width. Prepare the layout in the browser, then export PNG for your RIP or SVG for CorelDRAW. This app is not RIP software.
60 cm is 600 mm. Display units (in / cm / mm) only change how numbers are shown. The gang still uses millimetres.
Export PNG, then open it in your RIP such as Acrorip, Cadlink, or Kothari. DTF Gang Sheet prepares the layout. It is not RIP software and does not claim every 60 cm printer.
SVG keeps designs as groups so a shop can still edit in CorelDRAW, then flatten to a 300 DPI PNG for the RIP if that workflow needs it.
US and many export shops run 22 inch (558.8 mm). That layout is on the 22 inch page. Hyderabad print-shop units (mm / cm) belong on this URL.