Knowledge Center
Packaging Resources
Expert guides, sizing references, and industry standards to help you make informed decisions about corrugated packaging. Whether you are shipping products or moving your home, we have the knowledge you need.
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Quick Reference
The most frequently looked-up box data at a glance. For full details, visit the individual resource pages linked below.
Most Common Box Sizes
| Size (L x W x H) | Common Name | Volume (cu ft) | Best For |
|---|---|---|---|
| 6 x 6 x 6 | Small Cube | 0.13 | Candles, cosmetics, small gifts |
| 12 x 12 x 12 | Standard | 1.00 | General e-commerce, retail |
| 18 x 18 x 16 | Medium Moving | 3.00 | Kitchen items, small appliances |
| 24 x 24 x 24 | Extra Large | 8.00 | Bulk shipping, large items |
| 48 x 40 x 36 | Standard Gaylord | 40.0 | Bulk bins, pallet-scale storage |
Quick Box Grade Guide
| Grade / Rating | Wall Type | Max Load | Typical Use |
|---|---|---|---|
| 32 ECT | Single Wall | ~40 lbs | Standard e-commerce, books, light goods |
| 44 ECT | Single / Double | ~60 lbs | Canned goods, tools, heavy items |
| 48 ECT | Single Wall | ~80 lbs | Appliances, stacked pallets |
| 51 ECT | Double Wall | ~120 lbs | Industrial equipment, bulk manufacturing |
| 71 ECT | Double Wall | ~180 lbs | Machinery, dense products, max duty |
Key Industry Standards
| Standard | Organization | Scope |
|---|---|---|
| ASTM D4169 | ASTM International | Performance testing of shipping containers |
| ISTA 3A | ISTA | General simulation for parcel delivery |
| ISPM-15 | IPPC | International wood packaging regulation |
| TAPPI T 811 | TAPPI | Edge Crush Test (ECT) method |
| FSC / SFI | FSC / SFI | Sustainable forestry certification |
Tools & Calculators
Interactive tools to help you choose the right packaging and estimate your savings.
Packaging Glossary
Key terms used throughout the corrugated packaging industry. Bookmark this page for quick reference.
BCT (Box Compression Test)
The measured force required to crush a completed box. Determined by ECT value, box perimeter, and a multiplier constant.
BMC (Box Maker Certificate)
The round or rectangular stamp on a box flap certifying construction specs, ECT/Mullen rating, and weight limits.
Corrugated Board
A composite material consisting of one or more layers of fluted medium glued between flat linerboard sheets.
DIM Weight (Dimensional Weight)
A pricing method used by carriers that factors in box volume, not just actual weight. Calculated as (L x W x H) / DIM factor.
Double Wall
Board construction with two fluted layers between three linerboard sheets. Common in gaylords and heavy-duty shipping boxes.
ECT (Edge Crush Test)
Measures edgewise compressive strength of corrugated board in lbs per linear inch. Primary strength metric for stacking ability.
FEFCO Code
International code system for corrugated box styles published by the European Federation of Corrugated Board Manufacturers.
Flute
The wavy, arched layer of medium sandwiched between linerboard sheets. Flute type (A, B, C, E, F) determines thickness and performance.
Gaylord Box
A large corrugated bin designed to sit on a pallet, also called a bulk bin or pallet box. Typically 48 x 40 inches at the base.
HSC (Half Slotted Container)
A box with flaps on only one end (typically the bottom). Common gaylord style where the top remains open for loading.
Kraft Linerboard
The flat outer layers of corrugated board, made from kraft (virgin) or recycled fiber. Weight measured in lbs per 1,000 sq ft.
LTL (Less Than Truckload)
A freight shipping method for shipments too large for parcel but smaller than a full truckload. Common for bulk box orders.
Medium
The corrugated (wavy) inner sheet of a corrugated board panel. Made from semi-chemical or recycled fiber pulp.
Mullen Burst Test
Measures puncture resistance of corrugated board face in PSI. Older standard being replaced by ECT for most uses.
RSC (Regular Slotted Container)
The most common box style. All flaps are the same length; outer flaps meet at center. FEFCO code 0201.
Score Line
A crease pressed into corrugated board to create a fold line. Used for flaps and multi-depth box height adjustment.
Single Wall
Board construction with one fluted layer between two linerboard sheets. The most common corrugated structure for shipping boxes.
Triple Wall
Board construction with three fluted layers between four linerboard sheets. Heaviest-duty corrugated; can replace wooden crates.
Void Fill
Material used to fill empty space inside a box to prevent product movement. Includes paper, air pillows, foam, and packing peanuts.
Wax-Coated / Wax-Dipped
Corrugated board treated with wax for moisture resistance. Common in produce and food industry gaylords. Not recyclable.
Die-Cut Box
A box cut to a custom shape using a steel die, rather than standard slotted construction. Used for mailers and retail packaging.
Downloadable Resources
Printable reference materials for your warehouse, shipping station, or office. Contact us to request any of these resources.
Box Size Wall Chart
Poster-sized reference of all standard box dimensions. Ideal for hanging near packing stations.
ECT / Mullen Quick Card
Pocket-sized reference card with ECT ratings, Mullen equivalents, and max weight limits.
Condition Grading Sheet
Visual reference for box grading (A/B/C) with photos and criteria. Train your team to sort used boxes accurately.
Sustainability Report Template
Template for tracking your environmental impact from reusing boxes, including CO2, water, and energy savings.
Related Blog Posts
In-depth articles from our packaging experts covering topics from gaylord boxes to sustainable shipping strategies.
Recently Updated
Mar
2026
Added new categories: Gaylord-specific questions, environmental and sustainability questions, custom solutions, and pricing and payment details.
Mar
2026
New tables for wine shippers, book mailers, flat panels, picture frames, electronics boxes, and pallet-optimized sizes.
Mar
2026
New sections covering TAPPI test methods, FEFCO box style codes, ISO packaging standards, and UN dangerous goods overview.
Mar
2026
Added combined board configurations, international grade equivalents, cost comparisons, and printability by flute type.
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