Vancouver is a city on the north bank of the Columbia River in the U.S. state of Washington and the county seat of Clark County.
The width of the twin quilt is 66 +12 (for the two extra columns of 9 patches) + 4 (for the two extra strips of sashing) =82, which is a bit wider than your target of 78, but close enough. Plus, it's nice to have it a bit too large than a bit too small.
Because sizes vary among bedding manufacturers, listed below are approximate dimensions for down comforters to use as a general guideline. 1  Twin = 68 x 88 inches. 2  Twin Extra Long, commonly referred to as twin XL or TXL = 68 x 90 inches or longer. 3  Full/Queen = 90 x 90 inches or longer.