
Corrugated cardboard is more than just “cardboard.” Its multi-layered structure provides durability, cushioning, and reliable protection during shipping. Explore the differences, flutes, and best practices for premium packaging.
A standard corrugated box has three layers: an outer liner, a fluted middle layer, and an inner liner. This simple yet strong structure ensures your products are safe during transport.
Corrugated boxes are widely used in shipping because they balance strength, weight, and sustainability.

Corrugated board and carton board look similar, but they serve different purposes. Corrugated is stronger, perfect for shipping; carton board is lighter, better for retail packaging.

Flutes are the wavy middle layer of corrugated board. They provide cushioning, rigidity, and impact protection, making shipping safer for delicate products.

| Flute Type | Flutes / ft | Thickness | Recommended Use |
|---|---|---|---|
| A-Flute | 33 ± 3 | 3/16 in | Extra cushioning for fragile items. |
| B-Flute | 47 ± 3 | 1/8 in | Strong stacking & POP displays. |
| C-Flute | 39 ± 3 | 5/32 in | Balanced cushioning & stacking. |
Corrugated cardboard is more than just “cardboard.” Its multi-layered structure provides durability, cushioning, and reliable protection during shipping. Explore the differences, flutes, and best practices for premium packaging.
A standard corrugated box has three layers: an outer liner, a fluted middle layer, and an inner liner. This simple yet strong structure ensures your products are safe during transport.
Corrugated boxes are widely used in shipping because they balance strength, weight, and sustainability.

Corrugated board and carton board look similar, but they serve different purposes. Corrugated is stronger, perfect for shipping; carton board is lighter, better for retail packaging.

Flutes are the wavy middle layer of corrugated board. They provide cushioning, rigidity, and impact protection, making shipping safer for delicate products.

| Flute Type | Flutes / ft | Thickness | Recommended Use |
|---|---|---|---|
| A-Flute | 33 ± 3 | 3/16 in | Extra cushioning for fragile items. |
| B-Flute | 47 ± 3 | 1/8 in | Strong stacking & POP displays. |
| C-Flute | 39 ± 3 | 5/32 in | Balanced cushioning & stacking. |