If you will go to the site below and type in Boyd it will show you two Boyd Tartans. One is a full Sett, the other a half sett. As you will see the Scottish Tartan Authority is the principal authority world wide. At the bottom of each tartan swatch you will see the actual thread count for the tartan. W-White K-Black B-Blue G-Green R-Red Y-Yellow http://www.scottish-tartans-society.co.uk/search-for-tartans/search.asp Joe Boyd Williams