Start by measuring your item’s length, width, and height, then choose a box that fits snugly with a bit of room for cushioning. On this page you’ll see many sizes, such as 6x4x2, 6x4x3, 7x5x2, 9x6x4, 12x9x3, 16x12x3, and larger options like 15x12x10. If you’re mailing media, there are LP mailers and 45 RPM mailers sized for records. For delicate pieces, add cushioning like honeycomb packing paper to fill any gaps.

• Measure your item and compare to box interior.
• Leave room for protective wrap.
• Pick a shape that suits your item (cube vs. flat).

This approach can help reduce movement and improve protection.

They serve similar jobs but are designed a bit differently. Mailer boxes often feature tuck-top or tab-lock closures and are great for small items, branded packing, and quick assembly. You’ll also see corrugated mailers, height-adjustable styles, and literature boxes for documents.

• Mailers: Self-folding styles, clean presentation, good for small business orders.
• Shipping boxes: Traditional corrugated cartons in sizes like 6x6x6, 12x8x10, and 15x12x10, useful for bulkier items.
• Side-loading boxes: Open along the long edge to slide in flat items.

Choose based on item size, desired presentation, and how much cushioning you plan to add.

Packing fragile items is about fit and cushioning. A snug box helps limit movement, and protective wrap absorbs bumps. This page includes options like double-wall mailer/literature boxes and honeycomb packing paper that can provide added rigidity and padding.

1. Select a box that closely matches your item’s size.
2. Wrap the item fully with cushioning and add flat fillers to remove gaps.
3. Consider height-adjustable mailers to fine-tune the fit.
4. Mark the exterior as “Fragile” if helpful.

These steps can reduce shifting during transit, but outcomes may vary depending on handling and the item’s materials.

Adjustable or variable-depth mailer boxes are designed to fold down to different heights, so you can match the box depth to the contents. You’ll see terms like height-adjustable and variable depth on options here.

• Place your items inside and choose the fold position that best fits.
• Add thin pads or paper to remove any remaining space.
• Close the box using the built-in folds or tabs.

This style can be handy when you ship mixed items—like books, apparel, or kits—because it helps reduce movement without needing multiple box sizes. Results can vary based on item shape and packing materials.

Side-loading boxes open along the long edge, making it easier to slide in flat or wide items. You’ll find sizes like 9x12x3, which can suit documents, prints, and similar materials.

• Helpful for items you don’t want to bend when loading.
• Works well with literature boxes and thin mailers for stacked contents.
• Add protective sleeves or flat fillers to keep edges safe.

If your item is more compact or gift-ready, a tuck-top mailer may feel smoother to open. Pick the style that matches your item’s shape and the way you want to pack it.