MEDIUM #3 SIZE (9" x 12"): Suitable for mailing t-shirts, accessories, books, documents, cosmetics, and lightweight retail products STRONG SELF-SEAL ADHESIVE: Peel-and-seal closure provides a secure, tamper-resistant bond without requiring additional tape WATERPROOF & TEAR-RESISTANT: Durable polyethylene construction protects shipments from moisture, dirt, punctures, and handling damage LIGHTWEIGHT & COST-EFFECTIVE MAILING: Helps reduce postage expenses compared to boxes while maintaining dependable package protection VIBRANT TEAL PROFESSIONAL APPEARANCE: Bright teal color enhances brand presentation and helps packages stand out during delivery BULK 200-PACK SUPPLY: Convenient quantity for boutiques, eCommerce sellers, Etsy shops, online retailers, and daily mailing operations Add color and professionalism to your shipments with iMBAPrice Teal Poly Mailers 9 x 12 Inch (#3, 200-Pack). Designed for small businesses, boutiques, and eCommerce sellers, these durable mailing envelopes provide reliable protection while creating a memorable unboxing experience. Made from heavy-duty polyethylene, these mailers are both waterproof and tear-resistant, helping protect contents from moisture, dirt, and handling damage during transit. The strong self-sealing adhesive strip ensures fast and secure closure without the need for additional tape. The versatile 9 x 12 inch size is perfect for mailing clothing, accessories, books, cosmetics, documents, and other lightweight merchandise. Lightweight construction helps reduce mailing costs while maintaining dependable packaging performance. The vibrant teal finish helps businesses create a distinctive branded appearance while keeping shipments looking professional and attractive. With a convenient 200-pack bulk supply these poly mailers are ideal for growing businesses, online stores, subscription services, and high-volume mailing operations.