Paper envelopes are commonly used for mailing gift cards because they provide a simple, secure, and professional way to send them. Here's how they work and their advantages:

How They Work:

1. Protection: The envelope helps shield the gift card from physical damage, such as bending or scratches, during transit.

   
   

2. Sealing: The envelope can be sealed to ensure the gift card stays in place and is not lost or exposed. Some envelopes have a self-adhesive flap, making sealing easy.

3. Personalization: The outer surface can be written on, allowing for a personal touch like a note or greeting.

4. Discreet: A paper envelope conceals the gift card, maintaining an element of surprise for the recipient.

   
   

Advantages:

1. Eco-friendly: Paper is biodegradable and recyclable, making it a more environmentally friendly option compared to plastic alternatives.

   
   

2. Cost-effective: Paper envelopes are typically inexpensive and easy to find.

3. Customizable: They can be personalized or decorated to match the occasion, whether for birthdays, holidays, or other celebrations.

4. Professional appearance: They present the gift card in a neat and polished way, contributing to a more formal or thoughtful presentation.

   
   

5. Lightweight: They are easy to handle, transport, and mail without adding significant weight to the package.

So, paper envelopes are a reliable and practical choice for sending gift cards with both style and protection.