400 10" x 13" 3 Mil WHITE POLY MAILERS ENVELOPES BAGS 10 x 13 Lip Size: 1.5 +/- . 3-millimeter thickness (+/- 5%). Usable Dimensions: 10 x 13. Paper Liner: Clear with antistat. Adhesive: Synthetic rubber  Hotmelt,  minimum +/- 1/8.