20 Pack 12x10x3 inches Black Shipping Boxes, Corrugated Mailer Boxes, Packaging Boxes for Products, Recyclable Cardboard Box, Flat Literature Mailers for Gifts, Small Business by Mailing
Condition: New
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30-day returns
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FREE 30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
Only 3 left in stock, order soon!
Arrives
Friday, May 1
Size: 12x10x3 Inches-20pack
Features
- 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.
- Widely used: These 12''X10''X3'' boxes are very suitable for mailing, gifting packaging and storing cute items, such as books, jewelry, soap, candles, accessories, underwear, electronics, Jewelry, cosmetics, etc. These black boxes are suitable for gift giving. Makes your packages stand out more than others. Perfect for holiday, wedding gifts, Christmas gifts and birthday gifts or other occasions.
- DIY Appearance :Love to personalize? These 12 X10 X3 sleek boxes are perfect for DIY add stickers, paint, or ribbons to create a truly unique presentation! Or with branded stickers designs to transform basic shipping. Turn every shipment into a powerful branding opportunity.
Brand: Livejun
Color: Black
Material: Cardboard
Product Dimensions: 12"L x 10"W x 3"H
Item Weight: 7.9 Pounds
Breaking Strength: 5 Kilograms
Brand Name: Livejun
Manufacturer: Yixinzhiping
Unit Count: 24.0 Count
Color: Black
Material Type: Cardboard
Breaking Strength: 5 Kilograms
Item Dimensions L x W x H: 12"L x 10"W x 3"H
Item Weight: 7.9 Pounds
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Friday, May 1
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
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Top Amazon Reviews
Size: 9x7x4 Inches
These boxes are sturdy, easy to put together and look very nice. I’m using them to wrap Christmas gifts weighing about 2.5 pounds. Shipping was prompt. I highly recommend these boxes.
Reviewed in the United States on November 6, 2025 by Dawn Kopaczewski
Size: 5x5x3 Inches
These are very nice! =) I purchased these to use as shipping boxes for nail polish, and they arrived safely to the recipient (I also used bubble wrap/tissue/+outer bubble mailer). I am pleasantly surprised and satisfied with my purchase! They come packed, flat, in a sturdy storage box that will safely hold them until one needs to be used. The folding instructions come clearly printed on the storage box, and they are super easy to assemble! Very professional looking as well. I will purchase again if needed =)
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Reviewed in the United States on February 23, 2026 by bridgetgidget
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~
Size: 12x10x3 Inches-20pack
So happy about these great products and beautiful minimalist packaging
Reviewed in the United States on February 20, 2026 by SunFlower
Size: 5x5x3 Inches
Very sturdy, easy to assemble, and gives a classy professional finish
Reviewed in the United States on December 30, 2025 by TJ
Size: 5x5x3 Inches
Nice, sturdy! Not quite 5” due to thickness of the cardboard, though. But sturdy little boxes none the less
Reviewed in the United States on November 12, 2025 by April Denton
Size: 5x5x3 Inches
Very nice boxes. They give my business a more professional look when customers get their package in something other than a plain brown box. Fits a majority of my products and are perfect for shipping single items. Will definitely buy again.
Reviewed in the United States on November 25, 2025 by Geneva Foster
Size: 12x10x3 Inches-20pack
Sturdy, easy to fold and assemble. Perfect size for my project.
Reviewed in the United States on November 9, 2025 by MellaYella