Mini Green Popcorn Boxes (24 Pack) 3" x 3" x 4". These Mini Popcorn Boxes are perfect for all sorts of snacks and treats! Whether you're setting them out at summer picnics, outdoor concerts or handing them out to guests to give your movie night a more authentic theater feel, these paper boxes are a (2 dozen per unit) 3" x 3" x 4" Simple assembly required.