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.
These dimensions can also be used as a guide for mattress pads and covers. 1  Twin Fitted Sheet = 39 x 75 inches. 2  Twin Extra Long Fitted Sheet = 39 x 80 inches (Commonly referred to as twin XL, TXL, extended twin, or extra long twin.) 3  Full Fitted Sheet = 54 x 75 inches.