18x12x6 Corrugated Boxes (32 ECT) - Case of 25

An 18x12x6 corrugated shipping box (32 ECT) from a case of 25, shown with its four flaps open on a white background.
Made in USA
Custom Branding
An 18x12x6 corrugated shipping box (32 ECT) from a case of 25, shown with its four flaps open on a white background.
Custom Branding
In stock - Ships within 1 business day
$28.75
/ Case | 25 Units
SKU: Select an Option

Case(s) Volume Pricing
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Case(s) Volume Pricing
1+
$28.75/ Case
$1.15 / Unit
type in qty:
10 Cases = 1 Pallet

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Corrugated Shipping Box 18" x 12" x 6" Packaging Supply

Sturdy 32-ECT single-wall corrugated cartons bundled in a convenient 25-count case—ideal for shipping flat items, documents, and large-format products.

18" x 12" x 6" 32-ECT CORRUGATED SHIPPING BOXES

These 18 × 12 × 6 in. corrugated cartons deliver the everyday durability shippers expect from a 32 ECT-C single–wall box. The elongated rectangular design provides ample space for larger, flatter items while maintaining a low profile, perfect for products that require substantial length and width without excessive height.

Supplied flat in a case of 25, the boxes assemble in seconds, store compactly between projects, and recycle easily after use. From e-commerce fulfillment lines to warehouse pick-pack stations, they are the go-to choice for shipping artwork, documents, clothing, flat-pack furniture, and a wide range of large-format merchandise.

VALUE CASE OF 25

Buy in economical 25-count bundles to lower per-box costs and keep your packing line stocked without over-committing valuable storage space.

KEY ADVANTAGES

1
32 ECT single-wall board is certified for up to 65 lb (29 kg) gross weight and offers 32 lb/in edge-crush strength for reliable stacking.
2
Large rectangular design (18 × 12 × 6 in.) maximizes space for flat items while maintaining efficient stacking height.
3
Made from 100% recyclable Kraft corrugated fiberboard.
4
Ships and stores flat to save warehouse space.
5
Convenient 25-box case keeps supply levels steady for small and mid-size operations.

IDEAL APPLICATIONS

🖼️

Art & Document Shipping

The 18" x 12" x 6" size is perfect for shipping framed artwork, legal documents, certificates, and large-format prints with secure flat protection.

👗

Apparel & Textiles

Ideal for shipping folded clothing, textiles, bed linens, and fashion accessories that benefit from flat, wrinkle-free packaging.

📚

Books & Media

Perfect for shipping multiple books, magazines, vinyl records, and other flat media items that require protective packaging.

🔧

Flat-Pack Assembly

Excellent for shipping flat-pack furniture components, shelving units, and assembly kits that require large, low-profile packaging.

CORRUGATED FIBERBOARD ADVANTAGE

These 18" x 12" x 6" cartons are engineered from single-wall, C-flute corrugated kraft board with a certified 32 ECT (Edge-Crush-Test) rating, giving packers a strong yet lightweight shipping option. The material offers:

  • Three-layer construction (liner / medium / liner) that absorbs impact and resists puncture
  • 32 ECT rating that meets common carrier requirements for loads up to ≈40 lb (18 kg)
  • Kraft liners and starch-based adhesives that are 100 % curbside-recyclable and biodegradable
  • Lightweight design that lowers dimensional weight charges and reduces overall freight costs

PERFORMANCE PARAMETERS


Edge-Crush Strength

32 ECT compliant—capable of withstanding ≈32 lb per linear inch of edge load before failure


Recommended Load Capacity

Up to 40 lb (18 kg) of evenly distributed contents for typical parcel and LTL shipments


Internal Dimensions

18" L × 12" W × 6" D (0.75 ft³ / 21.2 L) for optimal large-format flat packaging


Quality Assurance

100% RECYCLABLE

Constructed from corrugated kraft paperboard that can be placed in curb-side paper recycling streams throughout North America

📦

32 ECT CERTIFIED

Meets the 32 lb Edge-Crush Test (ECT) standard, providing the compression strength required for regular slotted cartons used in standard shipping applications

MADE IN USA

Manufactured in U.S. facilities, supporting domestic jobs while maintaining consistent quality standards

🎨

CUSTOM PRINTING AVAILABLE

Transform these boxes into branded packaging with custom logos, colors, and messaging to enhance your customer's unboxing experience


YOUR PARTNER IN PACKAGING

As a United States Veteran-owned and operated packaging company based in Evansville, Indiana, we're committed to providing high-quality food-grade packaging solutions that help your business succeed. Our boxes exemplify our dedication to quality, functionality, and value.

PRODUCT FEATURES

Made of single-wall 32 ECT C-flute corrugated kraft board.
Packed 25 knocked-down cartons per case for easy inventory.
Natural kraft exterior accepts labels, markers, and ink-jet printing.
100% recyclable, biodegradable, and curbside-collection ready.

PRODUCT SPECIFICATIONS

STACKING STRENGTH
32 ECT edge-crush rating (≈200 lb/in burst equivalent)
CASE QUANTITY
25 boxes per bundle, shipped flat
PALLET QUANTITY
10 cases per pallet (250 boxes)

Are these 18x12x6 corrugated boxes strong enough for shipping flat or medium-weight items?

Yes. With a 32 ECT-C edge-crush test rating, these single-wall boxes support up to 40–45 lbs when packed correctly. The shallow, rectangular design makes them ideal for shipping items like printed materials, trays, apparel, boxed electronics, promotional kits, or grouped consumer goods.

Is the 32 ECT-C rating acceptable for FedEx, UPS, and USPS ground services?

Absolutely. These boxes meet the standard strength requirements used by major carriers for ground shipping. To ensure safe delivery, fill void spaces, keep contents below the 45 lb limit, and seal all flaps securely with quality tape.

What does the 32 ECT-C classification mean?

ECT (Edge Crush Test) measures how much pressure the edge of a corrugated board can withstand. A 32 ECT board handles 32 pounds per linear inch. The “C” flute refers to a common corrugation profile that provides good stacking and cushioning performance in single-wall cartons.

How many boxes come in a case, and how are they shipped?

Each case includes 25 boxes, bundled and shipped flat to reduce freight and storage costs. Assembly is simple—just square the box, fold in the flaps, and seal the bottom with carton tape.

Are these cartons made from recycled materials, and are they recyclable?

Yes. These boxes are made from Kraft linerboard containing 30–40% post-consumer recycled content. Once used, simply remove tape or labels and recycle them through standard corrugated waste streams.

Can these shallow boxes be stacked on a pallet?

Yes. Their 6" height allows for multiple layers per pallet. As long as each box remains under the 40–45 lb limit and is packed evenly, you can stack them efficiently. For stability, consider using chipboard or slip-sheets between layers and wrap the pallet to prevent shifting.

Are these boxes suitable for direct food contact?

No. These are not FDA-certified for direct contact with food. If needed for food service or bulk snacks, use a food-grade liner or poly bag inside the box.

Do these boxes require special tools, glue, or staples for assembly?

Not at all. These boxes are pre-scored and easy to fold. All you need is standard 2"–3" wide carton-sealing tape to close them securely—no special equipment required.

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