The Stickers are here, and that's the scale of them with a US quarter, nickle, and a bic lighter. Yes, they're small

To shoot these things through a pair of flywheels, I need to know how thick they are. Here's some measurements:

24 stickers / 9.40mm = 0.392mm

24 stickers / 9.42 mm = 0.393mm

20 stickers / 7.82mm = 0.391mm

17 stickers / 6.66mm = 0.392mm

13 stickers / 5.07mm = 0.390mm

I'm guessing the separation between the flywheels should be around 0.38mm. The flywheels will be make out of a squishy material, anyway.

I've finished the most dangerous part of the sticker gun: the part that holds the quadcopter motors. Just need to print it out: