Best Material: Made of opp plastic material, odor-free and non-toxic, durable and not easy to break, safe for storing foods. Size: Including two size, 400pieces 3.9*3.9 inch and 100 pieces 2.8 * 2.8inch. Easy to use: Each cookie gift bags contain a widened adhesive sealing strip, self sealing and no need twist ties, can seal tightly and keep your food fresh longer. Applications: Ideal for storing cookies/ snack nuts/ bakery/ candy/ chocolates/ biscuits. Perfect for party favors for Halloween,Christmas,New Year,Thanksgiving,birthdays, weddings, graduation and other holidays Package Includes: Include 400pieces big size and 100 pieces small size. Big size: (100 red monster cookie bags+100 yellow monster candy bags+100 green little monster bakery bags+100 pink bakery bags).Small size: 100 green monster bakery bags.