One meter of fabric is roughly 1 yard plus 3 inches. If you buy 11 meters of fabric, you will have 12 yards. Width is listed in centimeters. If you are driving, speed limits are posted in kilometers.
Gasoline is sold by the liter.
There are just under 4 liters in one U.S. gallon. You can bring any goods for personal use, with a few obvious exceptions. Any live plants or animals will likely face quarantine for a period long enough to make it not worth it to bring them to Costume-Con 19. The minimum age for bringing alcohol or tobacco into Canada depends on the province through which you enter the country. We can't guarantee that this exchange rate will be in effect for Costume-Con 19, but the rate has remained at this level for the past two years.