1. [Card size]: transparent plastic ID badge holder size is 6.5cm*11cm2. [Waterproof material]: The protective cover of the vertical document holder is made of durable PVC (polyvinyl chloride) material, which has the characteristics of abrasion resistance and corrosion resistance. This waterproof and dustproof ID card holder is perfect for keeping your important paper badges or cards dry, clean and safe.3. [Wearable design]: The hanging slot/hole design of this vaccine card protective cover is dual-purpose. The middle slot can be hung with a lanyard, keychain or retractable badge holder, and the holes on both sides can be hung with a rope, Strap, rope or string.4. [Multi-purpose]: Name badge holders for meetings, employee work badges, nurse badges, office staff, doctors, store labels, and fundraising activities.