The Norway and Swedish Tartans
Also, if anyone would like me to create a seamlessly tile-able, tartan wallpaper based on their surname, nationality, Sate, organization, et cetera, let me know, and I'd be happy to create one for you.
Where possible, I use official thread counts from the Scottish Register of Tartans, accurate to within two threads, because the thread count must be equally divisible by four, in order to tile seamlessly.
Of course, I am also able to able to invent tartan wallpapers, of my own. If you'd like me to create one for you, based on certain colors or numbers of particular interest to you, I would be happy to do that, too.