Use large burrito tortillas (10 inch). These pinwheels work best with flour instead of corn tortillas.
If you prefer sweet pickles, feel free to use those instead! Pickle spears, baby pickles, or regular-sized dill pickles will all work.
Store dill pickle pinwheels in an air-tight container kept in the refrigerator for up to 3 days. They are best served fresh as the longer they sit, the soggier they become.
If you want to prepare them in advance I would suggest doing so the morning of your event. This will give the flavors plenty of time to develop in the fridge but shouldn't give them enough time to get soggy.