18x12x6 Corrugated Boxes (32 ECT-C) - Case of 25
Frequently Bought Together
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
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
32 ECT compliant—capable of withstanding ≈32 lb per linear inch of edge load before failure
Up to 40 lb (18 kg) of evenly distributed contents for typical parcel and LTL shipments
18" L × 12" W × 6" D (0.75 ft³ / 21.2 L) for optimal large-format flat packaging
PRODUCT FEATURES
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.
Compatible Products
These products are designed to work perfectly with your selected item:
