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Choosing the right corrugated plastic sheet isn’t just about finding a size that fits. Dimensions affect material waste, printing efficiency, shipping costs, and the final price of your order.
For buyers comparing Coroplast sheet sizes, the familiar 4 × 8 ft format is often a starting point. However, custom dimensions may offer better value for industrial packaging, signage, and large-volume projects.
This guide covers common sheet sizes, thicknesses, customization options, and a real order from a U.S. customer.
What Are the Standard Coroplast Sheet Sizes?
Coroplast® is a recognized brand of corrugated polypropylene sheets. In the U.S., buyers also use the term when searching for similar fluted plastic boards.
One of the most common full-sheet dimensions is 48 × 96 inches (4 × 8 ft).
Other sizes are available depending on the manufacturer, product grade, and intended application.
| Sheet Size | Approximate Metric Size | Common Applications |
|---|---|---|
| 18 × 24 in | 457 × 610 mm | Yard signs and small displays |
| 24 × 36 in | 610 × 914 mm | Advertising and promotional signs |
| 48 × 96 in | 1219 × 2438 mm | Full-size boards and industrial packaging |
| 48 × 120 in | 1219 × 3048 mm | Large displays and custom cutting |
| 60 × 120 in | 1524 × 3048 mm | Oversized graphics and industrial panels |
These are reference sizes, not a guarantee of stock availability.
At Zibo Junhui Plastic Co., Ltd., our most frequently requested sheet size is 1220 × 2440 mm, which closely matches the American 4 × 8 ft format.
Why Is 1220 × 2440 mm So Popular?
This size works well for signage, printing, and industrial applications.
It also offers practical advantages for bulk purchasing.
At our factory, many customers choose 1220 × 2440 mm because it fits their cutting requirements and helps them plan efficient container loading.
For export orders, container utilization matters. A well-planned loading arrangement can reduce shipping costs per sheet.
However, the most efficient loading plan depends on sheet thickness, weight, pallet dimensions, and container type.
The goal is to balance material utilization, handling efficiency, and freight costs.
How Does Thickness Affect Your Choice?
When comparing Coroplast sheet sizes, thickness is just as important as length and width.
At Junhui Plastic, our commonly manufactured PP corrugated sheets range from 2 mm to 10 mm.
| Thickness | Typical Applications |
|---|---|
| 2 mm | Packaging liners and lightweight dividers |
| 3 mm | Boxes and protective inserts |
| 4 mm | Advertising boards and pallet layer pads |
| 5 mm | Reusable packaging and industrial separators |
| 6 mm | Automotive parts packaging |
| 8–10 mm | Heavy-duty packaging and protective boards |
These recommendations are general starting points.
The correct thickness depends on the required rigidity, sheet weight, and operating conditions.
Why GSM Matters When Buying Plastic Sheets
Two sheets with identical dimensions and thickness may perform differently.
That’s because their weight per square meter, or GSM, can vary.
For example, a 4 mm sheet weighing 1,000 gsm contains more material per square meter than a 4 mm sheet weighing 800 gsm.
The difference can affect rigidity, handling, and price.
For accurate quotations, buyers should provide both thickness and GSM whenever possible.
If the sheet must support a load, request suitable test data rather than relying on thickness alone.
Real Customer Case: 4 mm Printing Sheets for the U.S. Market
A U.S. customer purchased PP corrugated sheets from Junhui Plastic for advertising board production.
The order included the following specifications:
| Specification | Customer Requirement |
|---|---|
| Sheet Size | 1220 × 2440 mm |
| Thickness | 4 mm |
| Weight | 1,000 gsm |
| PP Content | 95% |
| Surface Treatment | Corona treatment |
| Application | Printable advertising boards |
The customer needed sheets suitable for printing various graphics and advertising designs.
Corona treatment was included to improve the surface’s suitability for printing.
The buyer selected 1220 × 2440 mm partly because this format supported efficient container loading and helped control transportation costs.
This project illustrates why sheet dimensions should be considered alongside printing requirements and shipping arrangements.
For buyers sourcing large quantities, the lowest sheet price doesn’t always deliver the lowest landed cost.
Can You Order Custom Coroplast Sheet Sizes?
Yes. Manufacturers of generic corrugated polypropylene sheets can offer custom dimensions beyond common retail formats.
At Junhui Plastic, our production equipment supports sheet widths of up to 3,000 mm.
For orders requiring this maximum production width, our minimum order quantity is 3 metric tons.
We also offer cutting services with a stated dimensional tolerance of ±0.5 mm, subject to the agreed product and processing specifications.
Available customization options include:
- Length and width
- Thickness and GSM
- Color and PP formulation
- Corona treatment for printing applications
- Cutting, die cutting, and printing
- Welding and other packaging conversion processes
Custom sizes are particularly useful when standard sheets create unnecessary cutting waste.
What Should Buyers Confirm Before Ordering?
Before requesting a quotation, prepare these details:
- Finished sheet dimensions
- Thickness and target GSM
- Material composition and color
- Printing or surface treatment requirements
- Order quantity
- Delivery destination and packaging requirements
For printed boards, confirm ink compatibility and print performance with samples.
For container shipments, ask your supplier to review the loading arrangement before finalizing the order.
Frequently Asked Questions
What is the most common Coroplast sheet size?
The 4 × 8 ft format is widely used for full-size signage and industrial sheet applications.
Is 1220 × 2440 mm exactly 4 × 8 ft?
No. It is slightly larger than the exact imperial dimensions of 1219.2 × 2438.4 mm.
Can corrugated plastic sheets be made 3 meters wide?
Yes. Junhui Plastic can manufacture sheets up to 3,000 mm wide, with a 3-metric-ton MOQ for maximum-width orders.
Are corona-treated sheets suitable for printing?
Corona treatment can improve surface wettability and printability. The printing process and ink system should still be tested for compatibility.
Final Thoughts
Understanding Coroplast sheet sizes helps buyers make better decisions about printing, packaging, and transportation.
For many industrial orders, 1220 × 2440 mm provides a practical starting point. Custom dimensions may offer additional savings when cutting layouts or loading requirements differ.
At Zibo Junhui Plastic Co., Ltd., we manufacture customized PP corrugated sheets for signage, packaging, and industrial applications.
Need a quotation? Send us your dimensions, thickness, GSM, printing requirements, and order quantity. Our team can help you review suitable specifications and shipping options.
