Used by the Scots of the 16th, 17th and 18th centuries, this knife was slightly larger than the average modern sgian-dubh and was carried in the upper sleeve or lining of the body of the jacket.
A portrait by Sir Henry Raeburn of Colonel Alasdair Ranaldson MacDonell of Glengarry hangs in the National Gallery of Scotland; it shows hanging from his belt on his right hand side a Highland Scottish dirk, and visible at the top of his right stocking what appears to be a nested set of two sgian-dubhs.
The earliest known blades, some housed in the National Museum of Scotland in Edinburgh, are made from German or Scandinavian steel, which was highly prized by the Highlanders.
[citation needed] Traditionally the scabbard is made of leather reinforced with wood and fitted with mounts of silver or some other metal which may be cast or engraved with designs ranging from Scottish thistles, Celtic knotwork, or heraldic elements such as a crest.
Since the modern sgian-dubh is worn mainly as a ceremonial item of dress and is usually not employed for cutting food or self-defence, blades are often of a simple construction.
The hilts used on many modern sgian-dubhs are made of plastic that has been molded to resemble carved wood and fitted with cast metal mounts and synthetic decorative stones.
Other examples are luxurious and expensive art pieces, with hand-carved ebony or bog wood hilts, sterling silver fittings and may have pommels set with genuine cairngorm stones and blades of Damascus steel or etched with Celtic designs or heraldic motifs.
Police gave Jeff McCarthy a $221 ticket for sporting it in his kilt hose while performing at the McGill University convocation ceremony on 2 November 2016.