FAST & EASY TO ASSEMBLE Thanks to the pre-assembled bottom, simply push the sides of the cupcake boxes and they pop up automatically. Assembly instruction is available. STURDY & ADJUSTABLE INSERT The sturdy insert keeps the cupcake standing in place and secure from messing up the icing. The insert diameter can be adjusted to fit either a standard or mini cupcake. KEEP CUPCAKES FRESH Made of recyclable food-grade cardboard paper, the individual cupcake containers keep your just baked cupcakes fresh and moist, which is different from the plastic cupcake containers. DIMENSIONS & SPACE SAVING The assembled cupcake box measures 3.5 3.5 3.5, and the insert diameter ranges from 1.8 to 2.4. The window size is 2.1 W 4 L. Each package includes 10 brown cupcake boxes and 10 cupcake inserts, folding flat for easy storage. Cupcake is not included. DECENT PRESENTATION FOR ALL EVENTS Our treat boxes work perfectly for all events. The large see-through window both on the front and the top keeps your dessert presentable without exposure to the air, which will be loved in a wedding reception, Christmas party, birthday party, baby shower party, and bake sale which use cupcake boxes bulk as bakery supplies.