MST Packaging Co., Ltd.

MST Packaging Co., Ltd.

How to Pick the Right Mailer Size?

2025 12/05

Mailing bags are commonly used for e-commerce shipping, document delivery, brand sample delivery, and mailing small everyday items. They are suitable for packaging lightweight or fragile products such as clothing, snacks, coffee bags, accessories, and cosmetics. Due to their lightweight, waterproof, low cost, and availability of environmentally friendly materials, mailing bags are widely used by various brands and individuals for shipping, becoming an efficient, safe, and sustainable packaging method.
 

Why is choosing the right shipping bag so important?

Choosing the right size shipping bag is crucial because it effectively reduces shipping costs, improves packaging efficiency, and better protects goods from damage during transit. Oversized bags waste materials and space, leading to higher shipping costs; undersized bags may compress or damage products. The correct size not only makes packaging more professional and aesthetically pleasing but also enhances the brand experience and demonstrates a company's commitment to sustainability and cost control.

 

Before choosing a mailing bag, measure three dimensions of your product: length (L), width (W), and height (H). Allow extra space (usually 1-2 cm) for protective padding or inner packaging.

General rule: The mailing bag should always be slightly larger than the product size plus the inner padding.

 

mailer bag

Choose the Right Type of Mailing Bag, Different products require different packaging structures. Here are some of the most common:

1. Kraft Paper Mailing Bags

Perfect for clothing, documents, and lightweight items. The style in the picture you provided is a 100% compostable kraft paper lined mailing bag.

2. Compostable Mailing Bags (PLA/PBAT/Kraft Paper + PLA Lining)

Ideal for brands focused on sustainability.

3. Polyethylene Mailing Bags/Recyclable Mailing Bags

Suitable for soft items such as clothing or accessories.

4. Bubble/Cushioned Mail Bags

Best suited for fragile items such as electronics, small electronic devices, or glass bottles.

 

Choosing the right mail-packing size is crucial for controlling costs, ensuring product safety, and enhancing brand professionalism. By accurately measuring, matching product characteristics, and selecting appropriate materials, you can build a more efficient and environmentally friendly packaging strategy.

MSTPACK is here to support you if you need assistance with selecting or customizing mail-packing sizes.