As X has stated it is relative to the width of the fabric not, as in the case of toilet paper ply, the thickness.

Therefore, you would need half as much double width fabric to make the same yardage kilt as you would in single width. The benefit of double width is that it is not typically twice the price, but rather, just a little more than single width. For example single width may be $30 per yard wherein double width will be $35 per yard (these numbers are for comparison only).

Some tartans are only woven in one width or the other.

Some retailers, such as Heritage of Scotland, sell all material calculated at the the same price regardless of which width it is woven in. In other words, they will send you 8 yards of single width (if that is the only width a particular tartan is woven in) for the price of 4 yards double width.

Hope that helps.


Brooke