This box of 500 Quality Park #10 Envelopes is perfect for your mailing needs. Made of 24lb white wove paper, each envelope measures 4-1/8 x 9-1/2 inches and weighs 6.28 pounds. The package dimensions are 12.44×9.88×4.29 inches, making it easy to store and transport.These envelopes are ideal for a variety of uses, including business and industrial settings. With the Brand name of Quality Park, you can trust that these envelopes will be a reliable choice for your mailing needs.