Plastic Business CardsPlastic Business Cards: Durable, Waterproof, and Memorable Plastic business cards are a durable way to make a lasting impression on new clients. These 3. 5" x 2" rounded corner cards are water resistant and tear proof, increasing the chances that customers will save and remember your contact information. Choose from white plastic, frosted plastic, or clear plastic options to best match your brand. Plastic Business Card Features Standard 3. 5" x 2"