To most non-Scots this might very well be THE kilt, the Stewart Royal or Royal Stewart being without doubt the best known of all tartans. It is a universal tartan, i.e. without clan affiliations. Besides kilts it is very often used for skirts, decoration etc.
Stewart tartan was worn by King George V during his state visit to Edinburgh in
1822 and he later adopted it for the House of Windsor to mark the ancient link
to the Royal House of Stewart. George V is reputed to have said that his
adopted tartan could be worn by all members of his family, which was taken to
mean all the people of the British Empire.
Due to its bright red colour you don't just blend in. You are being seen. But, after all, why should you try to conceal that you are wearing a kilt?
Below two different kilts are shown, a cheap approx. 4 yard light weight PV kilt from a vendor no longer on the market, and a James Morrison 5 yard 16 oz wool kilt from Heritage of Scotland. Due to the popularity of this tartan you can have it without extra charge, meaning for £151.
The tartans are not quite identical.
Wearing the Royal Stewart you are seen.