Types of Corrugated Cardboard Flutes You Should Know

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The more you learn about corrugated display box, the more you will find out. Most often with every display box made up of 3 layer sheets, the combinations are limitless.

But don’t worry, this is what we are here for…

In today’s blog we are going to share digestible information to help you get speed up to corrugate basics.

How will the corrugates function to offer strength and provide insulation to protect the package’s contents?

Semicircular structure of the corrugate wave distributes compression through its entire form, diverting weight onto its two abutments.

What are corrugate board types?

All corrugated cardboard are consist of at least 2 layers, one layer of fluting and one layer of liner. Fluting and liner can be combined to different types of board, satisfing different purpose, ie display related, shipping purpose.

Single Face Board-A

Single face board is consist with a corrugate layer and a liner layer. It can be used in cardboard display. How can?

There will be another layer of surface paper which we call CCNB, for printing. Once printed, the printing layer will be mounted to this single face board as we usually do in China in printing factories big and small.

Alternatively it can also can be used in interior packaging.

Single Wall Board-B

Obvioulsy the corrugate layer is glued between two sheets of liner board. This is the most common types of corrugate board.

With two outer liners this effectively adds extra rigidity and strength, making it suitable for holding relatively heavier items on display. Again, in China we can also add a CCNB layer with your graphics printed on.

In USA, Australia, European countries or other districts, single wall board can be direct print.

Double Wall Board-C

Three sheets of liner with two corrugate in between make it extremely durable.

We would come to this board without a second thought if a shelving display needs to hold up to 20kg per shelf. For example, to display drinks, solid goods.

In some cases, if the P.O.P display has a wide overall size, we also choose double wall corrugate to keep the whole display in shape.

Triple Wall Board-D

Four sheets of liner with three corrugate in between. Extra extremely strong. This type of board are more often used in shipping, to ship heavy items, for example automotive parts, tableware etc.

We seldom use it in display, however we do need it once or twice, like in this case, click to check it out.

50mm Thickness Corrugated Point of Purchase Display
50mm Thickness Corrugated Point of Purchase Display

What are the flute types?

Point of Purchase Display Corrugate Board Material Types
Point of Purchase Display Corrugate Board Material Types


A flute cardboard has excellent compression and cushioning. It is widely used in packaging frigile goods. We rarely use it in pop displays.


2.4-3.0mm in thickness. About 42-50 flutes per foot. B flutes provide good stacking strength and crushing resistance. Ideally used for canned goods and displays.


3.5-4.0mm in thickness. have about 39-43 flutes per foot. Being a common and strong cardboard choice, C flute is ideal for stacking and packing.


1.2-2.0mm in thickness. have about 90-94 flutes per foot. E flute corrugate has a thin thickness thus saves great space. It has excellent crush resistance and can be used for cardboard displays, ballet boxes, and packaging.


0.9-1.2mm in thickness. have about 126-128 flutes per foot. F flute has a robust crush resistence, and usually used in consumer goods packaging of cosmetics, jewelry.

There is a few cases we do use F flute to construct a POP display, this UBU brushes display from Australia is one of them.

SRT Shelf Ready Tray RRP Corrugate Display


This double wall corrugate material combines both B and C flutes. Its thickness is about 6mm to 7mm.

Cardboard displays that require a higher weight bearing capacity will use this type of board. Often we use it in master carton to ship and distribut pop displays.


As its name suggests EB flute combines E and B flute together into a double wall corrugate. Thickness around 4mm to 4.5mm

A very fine E corrugate combined with a relatively large B flute, this grade provides a great balance for transit and protection.

Under testing standard of ISTA-2A, we use EB flute to pack the inner display parts.

Designing Solutions for all Your Display and Packaging Needs

Hopefully this guide has given you a general idea on corrugate grades and display material choice for your upcoming display project.

However, should you have any other queries, or would like to see if your packaging is being manufactured from the most cost-effective material, then please do not hesitate to contact a design engineer at PACKWINS.

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Leahy Ly

Hello, I’m the author with 16+ years of experience in the Cardboard Display industry.  Happy to help with your custom and wholesale inquiries.

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