See below if you’re supplying your own artwork
File specs
File Format: PDF
All fonts embedded
Bleed minimum of 1.5mm
Artwork size equal to PDF Trim Box size
Media box size to be minimum Artwork Bleed size
If used, Knife colour to be set to ‘Overprint’ and named ‘Knife’
If used, White separation to be named ‘White’
Preferred
PDF format PDF X4/a
Image Resolution 300dpi
Spot Colours specified as ‘Lab’ colour space