3 OR 7 FOLD?
A tie's thickness depends largely on the material itself, but also the folding technique used. The standard tie is a so-called 3-fold where the tie is folded and pressed three times and then fitted with a lining to provide a balanced form. 7-fold means that the tie is folded an additional four times, which gives a thicker tie without the need for interlining. The technique requires a lot of silk and occurs often within the Italian, more extravagant, tie tradition.
3-fold ties from British Drake's where both ends of the tie are left completely open, also known as untipped.