13x11x3 in Pack of 20 Shipping Boxes - Sturdy Brown Mailer Boxes

In this review of the 13x11x3 in pack of 20 shipping boxes, the bottom line is simple: small businesses and crafters who ship lightweight, fragile items will appreciate a reliable, easy-to-assemble option that balances strength with recyclability. The reviewer found these brown corrugated mailer boxes to be a practical choice for packing hats, glassware, cosmetics and similar products because they are made from thickened, recyclable cardboard and arrive flat for compact storage. The single biggest reason to buy is the combination of compression resistance and quick assembly without tape or glue, which speeds packing operations while protecting contents.

Key Features

• Recyclable cardboard: The boxes are made from recyclable corrugated cardboard, offering an eco-friendlier option for routine shipping needs.
• Compression resistant: Thickened cardboard and a standard 90 degree corner help protect fragile items from crushing in transit.
• Quick assembly: Each mailer is designed to be assembled without tools, tape or glue, saving time for busy packers.
• Compact storage: The set of 20 ships flat in a larger box, which reduces storage footprint until boxes are needed.
• Practical size: At 13x11x3 in outer dimensions, the box suits small, lightweight items such as cups, perfume, cosmetics and hats.
• Light but strong: The material is lightweight for lower shipping weight while still offering adequate protection for many small goods.

Who It's For

This pack is aimed at small business owners, Etsy sellers and home-based stores that regularly mail small, lightweight, and somewhat fragile items and want a low-cost, recyclable mailer. It is especially useful for sellers who need a predictable, uniform box size for packing and postage calculations.

Those who need heavy-duty protection for very heavy or highly fragile items should look for reinforced or double-wall corrugated options. If you require custom printing or padded mailers, this plain brown pack may not meet branding or cushioning needs.

Pros & Cons

Pros

• Made from recyclable corrugated cardboard, which helps reduce waste compared with single-use plastics.
• Sturdy 90 degree corners and thickened walls offer solid protection for small fragile items.
• Arrives flat and assembles quickly without tape or glue, speeding up packing tasks.
• Uniform outer size of 13x11x3 in makes postage and storage simpler for consistent orders.

Cons

• Not padded internally, so additional void fill or cushioning is required for very fragile items.
• The plain brown finish may not suit sellers who want branded or printed mailers.

Specifications

Brand	lmjclzyee
Outer size	13 x 11 x 3 in
Inner size	12.6 x 10.6 x 2.8 in
Quantity	20 boxes per pack
Material	Recyclable corrugated cardboard
Assembly	No tape or glue required; tool-free assembly

Our Verdict

The 13x11x3 in pack of 20 brown mailer boxes offers good value for small sellers who need a reliable, recyclable shipping solution that is quick to assemble and protects everyday lightweight goods. Buy this set if you ship hats, cosmetics, small glassware or similar items and plan to add internal cushioning as needed; look elsewhere if you require printed branding or heavy-duty double-wall protection.

Frequently Asked Questions

Are these boxes padded?
They are plain corrugated boxes without internal padding, so additional cushioning is recommended for fragile items.

Do they come flat or assembled?
The 20 boxes ship flat in a larger box and are designed for quick assembly without tools, tape or glue.

What are the inner dimensions?
The inner dimensions are approximately 12.6 x 10.6 x 2.8 in, suitable for small, lightweight products.