Precision self-sealing valves allow instant inflate in seconds. Simply use the manual pump - each bag inflates to about 5.9"x7.9"size with optimal air retention Made from PE/PA material, these air pillows reduce waste by 70% compared to traditional packing peanuts. Excellent shock-absorbing and cushioning performance to ensure your packages arrive at their destination intact, also can be used as handbag and shoes stuffer to keep shape You will receive 100 count air pillows for shipping and 1pcs manual air pump, each air pillow is about 15*20cm, the quantity is enough to meet your daily use and replacement needs If you have any problem with the air pillow, pls feel free to tell us, we promise we will solve your issue ASAP Air Pillows for Shipping with Pump, 100 Count Inflatable Shipping Supplies Box Filler Packing Materials Alternative to Packing Peanuts, (5.9" * 7.9")