Deadliest dress?

I'm making Butterick 4919, a retro formal dress, for my husband's cousin's wedding in September.

The silk arrived this morning, and I laid and cut the pattern while Deadliest Warrior Ninja versus Hoplite played in the background. The silk was 54" wide, and I had six yards, so I had to lay it out in a single layer. I still came up with about a quarter yard left over, even though my fabric was narrower than it was supposed to be.