Sizes listed reflect measurements of the inner dimensions of the bag. Transparent enough for barcodes to be scanned through it. (40% Tobias Light Transmission using Test Method ASTM D-1003). Printed with Lot Numbers and ESD Protective Symbol per ANSI/ESD S8.1 and MIL-STD-2073 standards. Satisfies ANSI/ESD S20.20-2014, MIL-PRF-81705E, REACH, and RoHS. Has the equivalent of an S rating (electrostatic discharge shielding) per EN 61340-5-3 standard.