The new cereal can be be found now at Walmart, which has a 60-day exclusive on them after which you'll be able to get them at other stores as well.
Reese's Puffs Big Puffs cereal features the same chocolate-and-peanut-butter-flavored corn puffs but look to be about three times bigger in size.
Walmart is selling them in 15.5-oz boxes for $3.64.
Photo via Walmart.