Export a PDF to these settings:

Specification: NewspaperAds_1v3 (by GWG)

PDF Standard: PDF/X-1a:2001

Convert to CMYK using these settings:

Profile: ISOnewspaper26v4 [download] (IFRA26 Max TAC 240)

Includes: Comment, 7 Days, Business, Cash, Weather & Travel Classified (listed as separate publication on main publication page: http://specle.net/uk/guardian-news-media/observer-travel-classified)

The specifications contained in this publication are for Display (Run Of Paper) only.

For a list of approved repro houses, Bureaus and advertising delivery methods please see the links below:

Delivery Methods: http://www.guardian.co.uk/advertising/electronic-ad-delivery

Approved Senders: http://www.guardian.co.uk/advertising/advertising-specifications

For some general guidelines to designing your ad to make it suitable for print, please see this link: http://specle.net/uk/guardian-news-media/notes/general-guidelines-for-guardian-print-advertising

WE DO NOT accept emailed advertising of any type. You must use one of our approved delivery methods.

We never accept any advertising copy with crop marks, colour bars or other printers marks of any description. Advertising should be supplied to exact dimensions only.