Ecommerce Packaging: Materials and Best Practices

Packaging Types for Ecommerce

Corrugated boxes are the standard packaging for most ecommerce shipments. Single-wall corrugated (the most common type) handles products up to about 30 pounds. Double-wall corrugated provides additional crush resistance for heavy items (30 to 70 pounds) and fragile products. Standard brown kraft boxes are the cheapest option at $0.40 to $2.00 per box depending on size and quantity. Custom-printed boxes with your brand logo and colors start at $1.50 to $4.00 per box with minimum orders of 500 to 1,000 units.

Poly mailers are lightweight plastic bags, typically made from polyethylene, that are the best packaging option for soft goods like clothing, fabric items, books, and non-fragile products that do not need rigid protection. Poly mailers cost $0.05 to $0.20 each, weigh under an ounce, and have minimal dimensional footprint because they conform to the product shape. A t-shirt in a 10 x 13 inch poly mailer ships via USPS First Class for $4 to $5. The same t-shirt in a 12 x 10 x 4 inch box ships for $7 to $9 because of the dimensional weight increase. For clothing brands, switching from boxes to poly mailers can cut shipping costs by 30% to 50%.

Padded mailers (bubble mailers) add a layer of bubble wrap lining inside a paper or poly exterior, providing moderate protection for semi-fragile items like electronics accessories, cosmetics, and small household items. Padded mailers cost $0.15 to $0.50 each depending on size. They offer a middle ground between the zero protection of poly mailers and the full rigidity of boxes. For items that need some cushioning but would be oversized in a box, padded mailers are ideal.

Rigid mailers are flat, non-bendable cardboard envelopes designed for items that must ship flat and cannot be bent, such as photographs, vinyl records, certificates, and thin electronics like tablets. Rigid mailers cost $0.50 to $1.50 and protect against bending and folding during transit.

USPS flat rate packaging is free from USPS and ships at a fixed price regardless of weight. Priority Mail Small Flat Rate Boxes ($10.40), Medium Flat Rate Boxes ($16.10), and Large Flat Rate Boxes ($22.10) are cost-effective for heavy, dense items that fit inside the fixed dimensions. If your product weighs 10 pounds and fits in a Medium Flat Rate Box, you pay $16.10 regardless of destination. Shipping that same weight via UPS Ground to Zone 8 would cost $20 or more.

Right-Sizing Your Packaging

Right-sizing means using the smallest packaging that safely contains and protects your product, eliminating wasted space that drives up dimensional weight charges. Carriers calculate dimensional weight as length times width times height divided by 139. Every inch of unnecessary box dimension increases your shipping cost.

Start by measuring your top 10 selling products packed and ready to ship. Record the length, width, and height of the product plus any protective wrapping. Then select box sizes that leave 1 to 2 inches of clearance on each side for void fill, nothing more. Most ecommerce stores need only 3 to 4 box sizes to cover 90% of their single-item orders:

• Small: 8 x 6 x 4 inches or similar for small products like cosmetics, accessories, small electronics
• Medium: 12 x 10 x 6 inches for mid-sized products like shoes, kitchen items, medium electronics
• Large: 16 x 12 x 8 inches for larger products like clothing bundles, home goods, multiple items
• Flat/mailer: Poly or padded mailers for soft goods and non-fragile items that do not need a box

For multi-item orders, either pack items into the smallest box that fits the combination or use a slightly larger box from your inventory. Avoid the temptation to use one large box size for everything. A small product in a large box costs you extra in dimensional weight and requires extra void fill to prevent the product from rattling around during transit.

Void Fill and Product Protection

Air pillows are the most cost-effective void fill for most ecommerce operations. They weigh almost nothing (keeping actual weight low), fill space quickly, and provide moderate cushioning. Air pillow machines from companies like FillPak and Sealed Air cost $1,000 to $3,000 for the machine and produce pillows at $0.01 to $0.03 each. For lower volumes, pre-inflated air pillows purchased in bags cost $0.03 to $0.05 each.

Kraft packing paper is crumpled and stuffed around products for cushioning and void fill. It costs $0.02 to $0.05 per sheet, is fully recyclable, and provides good protection for moderate-fragility items. Paper looks more premium than air pillows during unboxing and is preferred by customers who prioritize eco-friendly packaging.

Bubble wrap provides the best cushioning for fragile items. Standard 3/16 inch small bubble protects against vibration and minor impacts. Large 1/2 inch bubble protects against drops and heavy impacts. Wrap fragile items in at least two layers of bubble wrap with all surfaces covered. Bubble wrap costs $0.05 to $0.15 per linear foot depending on width and bubble size. Use it selectively for fragile items rather than as general void fill, because it is more expensive and less space-efficient than air pillows for filling empty space.

Foam inserts are custom-cut or molded foam pieces that hold products in a fixed position inside the box. These are used for high-value, fragile products like electronics, glassware, and collectibles. Custom foam inserts cost $0.50 to $3.00 per unit and require upfront tooling costs for the mold. They provide the best protection and the most premium unboxing experience but are only cost-justified for products with sufficient margins.

Branded Packaging Considerations

Custom branded packaging creates a memorable unboxing experience that encourages social sharing, repeat purchases, and brand loyalty. The trade-off is cost. A custom-printed box costs $1.50 to $4.00 each compared to $0.40 to $1.00 for a plain kraft box. Branded tissue paper, stickers, and inserts add another $0.20 to $1.00 per order. At 500 orders per month, branded packaging adds $850 to $2,500 monthly to your fulfillment costs.

The most cost-effective approach to branded packaging is using plain kraft boxes with branded elements. A custom sticker ($0.05 to $0.10 each) on a plain box, custom tissue paper ($0.10 to $0.20 per sheet), and a branded thank-you card ($0.05 to $0.10 each) create a branded experience for $0.20 to $0.40 per order instead of $2 to $4 for a fully custom box. This approach also lets you order boxes in smaller quantities without the 500 to 1,000 unit minimums that custom box printing requires.

Sourcing Packaging Materials

Uline is the largest US packaging supplier with same-day shipping on most items and the widest selection of box sizes, mailers, and materials. Pricing is competitive on large orders but higher than alternatives on small quantities. Uline is the default choice for reliability and selection.

EcoEnclose specializes in eco-friendly packaging including recycled corrugated boxes, compostable poly mailers, and paper-based alternatives to plastic packaging. Pricing is 10% to 20% higher than conventional options but appeals to environmentally conscious brands and customers.

The Packaging Company (TPC) offers custom printed boxes, mailers, and packaging at competitive prices with lower minimum order quantities than many custom packaging suppliers. Good option for branded packaging without ordering 5,000 units.

Amazon and eBay are surprisingly good sources for generic packaging materials. Poly mailers, padded mailers, and basic corrugated boxes are available at competitive prices with fast delivery through third-party sellers on both platforms.