JAM PAPER #10 Airmail Envelopes - 4 1/8 x 9 1/2 - White - 100/Pack Color: White Open End Airmail Envelope Size: #10 (4.13 x 9.5 inches) Quantity: 1000 per carton Made of 20lb paper with a smooth finish and airmail design to add a little flair to your next letter or correspondence! These fun, colorful envelopes are perfect for making your mail stand out from the pile!