Flat Boxes

Free Shipping and Picked up by the CARRIER THE SAME DAY $35+ on orders placed before 3 p.m. EST

For volume/bulk pricing and lower LTL rate quotes call 800-878-7703 or fill out the form.

Sku Size Strength Price Tier Pricing Bundle/ Bale Qty. Add To Cart
100 250 500 1000
BOX120904 12" x 9" x 4" 200 lb. / ECT32 $1.90 $1.82 $1.77 $1.71 $1.67 25/500
BOX121004 12" x 10" x 4" 200 lb. / ECT32 $1.81 $1.74 $1.70 $1.67 $1.54 25/750
BOX121204 12" x 12" x 4" 200 lb. / ECT32 $1.93 $1.64 $1.64 $1.22 $1.18 25/500
BOX121206 12 x 12 x 6" 200 lb. / ECT32 $2.14 $2.12 $2.12 $2.10 $2.08 25/500
BOX201206 20" x 12" x 6" 200 lb. / ECT32 $1.34 $1.34 $1.34 $1.34 $1.34 25/250

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Flat Boxes – Everything You Need to Know About Shipping Boxes

At StarBoxes, we know that finding the right box size can be challenging. Many customers end up wasting space by choosing a larger flat box than needed, either because they aren’t sure of the exact size required or they’re overwhelmed by too many options. That’s why we’ve simplified our flat box offerings to provide you with efficient, practical choices that perfectly suit your shipping and storage needs.

What Are Flat Boxes?
Flat boxes are specially designed corrugated boxes with a slim profile, making them ideal for shipping, packing, and storing thin, lightweight, or narrow items. They help prevent bending, creasing, or damage during transit while maximizing space efficiency. Whether you’re mailing artwork, books, picture frames, documents, or retail products, flat shipping boxes provide reliable protection and easy handling.

When combined with bubble cushion wrap or Styrofoam packing structures, flat boxes further enhance product safety by distributing impact along the length of the box and protecting delicate contents. This makes them an excellent choice not only for shipping but also for long-term storage.

Things to Consider When Buying Flat Boxes

  • Size matters. Always measure your item carefully and leave room for cushioning materials to prevent stress during packaging and transit.
  • Box type. Standard brown flat boxes are perfect for general shipping. For a polished look, you can add branded tape, stickers, or packing list envelopes to enhance presentation.
  • Custom solutions. If you can’t find a standard size that fits your needs, tailored flat boxes are a great option, especially for retail businesses requiring specific dimensions or branding.

Why Choose StarBoxes Flat Boxes?

  • Durable corrugated construction for maximum protection.
  • Available in multiple sizes to match your products.
  • Easy to assemble, lightweight, and shipped flat for storage efficiency.
  • Cost-effective bulk pricing for businesses and frequent shippers.
  • Quick delivery times and 24/7 online ordering for your convenience.

Perfect for Business and Personal Use

  • E-commerce businesses shipping prints, catalogs, calendars, or frames.
  • Offices mailing presentations, contracts, and reports.
  • Individuals sending photo albums, certificates, and gifts.

Buy the Best Flat Boxes at StarBoxes Today!
At StarBoxes, we provide more than just boxes—we provide smart packaging solutions. Alongside flat boxes, explore our wide selection of packaging materials including corrugated sheets, multi-depth boxes, cube boxes, bubble rolls, and more. With competitive pricing, bulk discounts, and nationwide delivery, we make shipping stress-free and cost-effective.

Browse our collection of flat boxes today and ship with confidence knowing your items are protected from start to finish. For questions or a free estimate, contact us anytime—we’re here to help!