The sizes are slightly bigger than other’s. Easy to insert printed badges, not damage the paper. The Plastic Single Layer Thickness is 0.4mm, thicker 60% than Standard 0.25mm. All New poly vinyl chloride material,No Recycling Plastic Scrap. They are flat and good looking, not like other's flimsy and warp(bend/tangled up /wavy). Match your clothes. The Resealable Zip are very good, waterproof sealing treatment, easy to open and close. Crystal clear transparent on both sides. The cards with barcodes or QR codes can be scanned without removing it from the badge sleeve holder. Usage: Business Exhibition Trade Shows Conference Reunions Meeting Press credentials Senior centers Company Workshop Shop Work Office Library Hotel Disney Cruise Ship Travel Luggage Tags, Premium Clothes hang photo label, i.d i'd identification Name Tags Credit Card Membership Card Staff Key Card Fuel cards Bus subway Passes lab sample bag