Peter Burt

Hi, no to export persona, just file, export.

Just a suggestion, try exporting as an EPS if Silhouette software can use it. Also could your horizontal lines extend beyond the width of your graphic visible area, if so you could make cut boxes instead of just lines, if not have you grouped the horizontal lines, this may help. Maybe upload your AD file so others could have a look for you.

DPI was set to 300 on both occasions, also how does changing DPI setting change the size of a vector?

I have just had same problem PDF export preset 'for print' size completely wrong when importing to corel draw for cutting vinyl. However changing preset to 'digital high quality' now perfect. Hope this helps others.