Personally, I prefer pixy stic as the singular.
Apart from the heavenly giant mutated pixy stix, there are also regular, normal sized ones. These are about 16 cm / 6 in long paper tubes filled with delicious sugary goodness.
Another interesting thing that sets them apart from other types of Halloween candy is that these puppies are labelled for individual resale! That's right, on the side of every one of these papery straws of beauty is a list of ingredients: "Dextrose, Citric Acid and Less Than 2% of Artificial Flavors," and the colors which vary by flavor.
Pixy Stix are sold under the Wonka brand and manufactured by Nestlé.