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20 Pack 12x10x3 inch Black Shipping Boxes, Corrugated Cardboard Mailer Box

Based on 111 reviews
Condition: New
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$28.99

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Availability: Only 3 left in stock, order soon!
Fulfilled by Amazon

Arrives Wednesday, Nov 4
Order within 16 hours and 41 minutes

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At a glance

Condition
New
Size
12x10x3 in-20pack
Model
LJ-BK-250701
Color
Black
Material
Cardboard
Breaking Strength
5 kg
Package Size Name
20 Pack

Features 6

  • Small shipping Boxes 20 Pack You will get one parcel with 20 pieces black mailing boxes . Each shipping box measures 12 x 10 x 3 inches outer size, and 11.6 x 9.8 x 2.9 inches inner size. We pay attention to every detail of the carton production. The support of 90 right-angle will protect your items in good condition while delivery.
  • Black Cardboard Boxes :12 x 10 x 3 inches black boxes feature perfectly flat edges, zero burrs, and the outer a smooth black finish professional look ,the interior are brown and have corrugated marks . The two colors combination makes Corrugated Cardboard Boxes look elegant and beautiful, ideal for gift packaging or shipping packaging.
  • Heavy-Duty & Gift-Ready Black Mailers: Crafted from 32 ECT grade material corrugated cardboard, these boxes are stiffer than standard boxes for ultimate protection. They're strong, durable, and easy to pack saving you time on packaging. The sleek black finish looks professional and polished, making them perfect for premium shipping or elegant gift-giving. recyclable design means value that lasts!
  • Easy to Assemble Black Mailer Box: The assembly of the shipping boxes is very simple. Every box's line is clear, making the packaging can be folding in a few seconds without tape, glue or staples. The simple and effective design makes the assembly easy, convenient and fast. The shipping box is resistant to impact and pressure, which can reduce the wear and tear of the goods during transportation, and provide better protection.

Description

Follow Livejun get more pratical product and happy life. The shipping boxes folding line is clear and easy to use, making the packaging and delivery faster. It is neatly cut and flatly packed to save space, the slot is firmly clasped and not easy to loose, which can secure the packaging during transportation. These 12*10*3 literature mailerboxes are perfect for securely packaging various items including photo frames, novels, apparel, presents, handmade goods, and more. Please make sure to know the size of the paper box before making the purchase. These 12x10x3 boxes material are 32 ECT grade, single wall corrugated boxes, strong and durable, made of durable kraft corrugated cartons that are recyclable , easy to pack, the standard 90° angles will protect your items in good condition while delivery. Featuring a smooth, uncoated surface ideal for direct printing, stamps, or labels, these boxes elevate your brand image while functioning as mobile advertising when shipped to customers. These gift packaging boxes feature a smooth, minimalist surface that's ideal for creative decoration. Perfect for transforming into personalized gift packaging, they let you design unique presentation boxes for special occasions while offering endless creative possibilities.

Specs 13

Brand Livejun
Color Black
Material Cardboard
Product Dimensions 12"L x 10"W x 3"H
Breaking Strength 5 kg
Package Size Name 20 Pack
Item Highlight Sturdy Recyclable Mailer Boxes for Products, Gifts, and Literature. Flat Design for Easy Storage, Perfect for Small Business
Unit Count 24 Count

Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Nov 4

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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  • Financing through Apple Pay
  • Financing through Google Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


Beautiful boxes
Size: 5x5x3 Inches
Very elegant, easy to assemble, sturdy. The matte finish looks high end. I used one to pack a birthday gift to give in person so I added a printed birthday greeting on top. I'm super happy with these boxes.
Reviewed in the United States on May 5, 2026 by S.T.

Need a sturdy box? Get these!
Size: 8x6x2 Inches
These are awesome. I use them for my business. Very sturdy and good quality.
Reviewed in the United States on July 4, 2026 by Lisa

Great
Size: 5x5x3 Inches
Very nice! Great for watches
Reviewed in the United States on May 30, 2026 by Marcaus Shupp

Perfect!
Size: 5x5x3 Inches
Durable. Easy to assemble.
Reviewed in the United States on June 13, 2026 by Karma Sweet VI

Great quality
Size: 8x6x2 Inches
Perfect for my small business. Quality was great.
Reviewed in the United States on May 27, 2026 by Chase and Carly Nichols

Count your boxes
Size: 5x5x3 Inches
Perfect box however twice I had boxes come I. And both sets were short. One shorted 3 and the second shorted 4. Do people not think that a customer needing a certain amount won’t count. Seriously. Otherwise great product
Reviewed in the United States on May 24, 2026 by Debbie McGrory

Perfect little shipping boxes
Size: 8x6x2 Inches
Great shipping boxes! Super easy to assemble! The black makes them look more professional in my opinion. They are sturdy and perfect size for what I need. Great price for the quantity you receive
Reviewed in the United States on January 11, 2026 by Kelly C~

Very convenient pack
Size: 12x10x3 Inches-20pack
💕 good quality 👌
Reviewed in the United States on June 9, 2026 by Nellyenid
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