co-extrudedbubble envelope is made of poly outside and bubble liner inside, and Adhesive or Velcro Closure., which has the toughness and shockproof advantage, supply the best protection. It's a good quake proof, push-proof and scratch proof during transit Max internal closed size is 420x600 mm, and min size is 70x90 mm. The material is metallic film and PE bubble. Available various sizes, colors and printing. 5 days per 40 HQ. Free samples ! Usage Be used in post office, logistics, craft glasswork, tape, CD, camera lens, film, certificate, IC card ,mini-type machine accessory, books, toy, photo frame and drug, etc Item No.Standard Size (inch)Standard Size (mm)#0004” x 8”102 x 203#005” x 8”127 x 203#06” x 10”152 x 254#17.25” x 12”184 x 305#28.5” x 12”216 x 305#38.5” x 14.5”216 x 368#49.5” x 14241 x 356#510.5“ x 16”267 x 406#612.5“ x 19”318 x 483#714.5”x 20”368 x 508#CD7.25” x 8”184 x 203A3 size11.7" x 16.5"297 x 420A4 size8.3" x 11.7 "210 x 2971/2 A4 size4.2" x 5.9105 x 149A5 size5.8 " x 8.3"148 x 210A6 size5.7" x 4.2"144 x 105 Buy more , save more !