One commercial site lists 13,000 tartans available although this will include "International" Tartans so probably half this (thought to be around 7,000). The Scottish Tartans Authority offers 3,700 on-line but has over 5,500 (although some of these are listed as academic - colours may not be agreed or obscure tartans). There is also the Scottish Tartan Register but both of these were superseded in early 2009 by the Scottish Tartans Authority established by the Scottish Parliament to look after and promote tartan (links below). There is nothing to stop anyone registering their own so this number grows as time goes on (around a 150 a year). Today as well as the Clan and Regimental tartans even companies, football teams, the Scottish Rugby Union and families have all have registered tartans and a Clan may have a number of tartans associated with it's name (usually classified as Clan - Standard, Hunting - Darker, Dress -White background).
although...and this is my words...there is at least 264 official clans in Scotland so to begin with there would only have been that amount of tartans....it is amazing the different combination and colours that could be used...incidently the Falkirk football club was the last 'official' tartan to be created...there is also one call the Heather tartan as well
and also unless your a Highland Dancer its only the males that wear the kilt
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