Cardboard Cut Out Up And Away Popcorn Boxes. (2 Dozen Per Unit) 3" x 3" x 4" Box With 2 1/2" x 4 1/2" Zoom into your birthday party with these Up And Away Popcorn Boxes. Fill these adorable popcorn boxes with candy, homemade treats, sweet mixes or classic popcorn to keep your party guests fueled up during the birthday festivities. Cardboard. (2 dozen per unit) 3" x 3" x 4" box with 2 1/2" x 4 1/2" Cut out airplanes.