The SLA have made some resources available in Welsh:
GENERAL PROMOTIONAL POSTERS
International School Libraries Day Bookmarks
The bookmarks are intended for printing out at good quality resolution at A4 size with margins to fit most printers (3 bookmarks per sheet), though the result may depend on the quality of your printer or paper. They could also be sent to your local digital print shop if you want to get the best results.
Two bookmarks are available, one intended mainly for primary schools and one principally for secondary schools. They are both around 270 KB in size. You will need the free Adobe Reader to view and print them.
PDF file, 274 kB
Requires Adobe Reader