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.
A twin bed is the smallest adult mattress size, and it measuresÃ approximately 38 inches wide by 75 inches long. Twin beds and full size beds are actually both the same length. For individuals who are tall but require a twin sized bed, a twin extra-long mattress size is available.