Prince Street Pizza Spicy Spring squares . The best.
They dont have to be little.
Its the type of pepperoni.
You must use a good Natural casing pepperoni. You can ask the Pizza places what they use. I had stuff bought online that sells to Pizza houses, and I also have put Boars Head Natural casing sticks on my deli slicer. And they curl.
If you are interested here is the science on "Grease cup".
Why Does Pepperoni Curl? | The Food Lab
As far as who does that in CT. Ive had it here but Its kinda random.