19x24 Inch White Poly Mailers Shipping Mailing Envelopes Bags 2 Mil Thick,packing 100pcs Lip Size: 1.5 +/- . 2-millimeter thickness (+/- 5%). Usable Dimensions: 19 x 24. Paper Liner: Clear with antistat. Adhesive: Synthetic rubber  Hotmelt,  minimum +/- 1/8.