RetailSource E050401YF100 Packing List Enclosed (Full Face) Envelopes, 5.5" x 4.5" x 1", Yellow (Pack of 100) Full face, colored packing list envelopes are pre-printed with packing list enclosed on heavy 2 mil poly Hot melt adhesive backing provides strong adhesion to paper and corrugated products Envelopes open along the first dimension Made in USA Made in USA