You can receive parcels up to 15kg with the BlueBox locker. Packages that are larger or heavier cannot be accepted. More compartment sizes are coming soon. Download our spec book to learn more details! Small: 19.7x15x5.1 inches Medium: 19.7x15x10 inches Large: 19.7x15x16.9 inches Extra-Large: 19.7x15x18.4 inches Oversized: 19.7x15x37 inches