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Serving Portland, Oregon and the metro area
Referral service. Quotes come from partner suppliers.
One layer of fluting between two liners, the most common way to build a corrugated box. Request used single wall boxes through partner suppliers.
Single wall corrugated board consists of one layer of fluted medium sandwiched between two flat linerboard faces. This construction creates a lightweight yet sturdy material suited to a wide range of products.
The fluting acts as a cushion, absorbing impacts and vibrations during transit. The outer liners provide a smooth surface for printing and labeling while adding structural rigidity.
Single wall is the most common corrugated construction, popular for its balance of protection and weight. Used single wall boxes are available through partner suppliers, and availability depends on them.
Fine fluting for excellent printing surface. Great for retail displays and lightweight items.
The most common flute type. Good balance of cushioning and stacking strength for general shipping.
Micro-flute for thin, lightweight packaging. Perfect for mailers and small product boxes.
| Dimensions (L x W x H) | Common ECT | Typical Use |
|---|---|---|
| 4 x 4 x 4 | 32 | Jewelry, small parts, samples |
| 6 x 6 x 6 | 32 | Small items, candles, samples |
| 8 x 8 x 8 | 32 | Candles, jars, small electronics |
| 10 x 8 x 6 | 32 | Books, DVDs, documents |
| 12 x 10 x 8 | 32 | Retail goods, craft supplies |
| 12 x 12 x 12 | 32 | Kitchen items, toys |
| 14 x 14 x 14 | 32 | Clothing bundles, light equipment |
| 16 x 12 x 12 | 32 | Shoes, retail goods |
| 16 x 16 x 16 | 44 | Medium electronics, small appliances |
| 18 x 14 x 12 | 44 | Office supplies, tools |
| 18 x 18 x 16 | 44 | Medium appliances, bulk items |
| 18 x 18 x 24 | 44 | Moving boxes, household items |
| 20 x 20 x 20 | 44 | Large items, multiple products |
| 24 x 18 x 18 | 44 | Linens, pillows, bulky items |
| 24 x 24 x 24 | 44 | Moving, storage, large items |
| 24 x 20 x 12 | 44 | Flat items, trays, baking supplies |
| 30 x 18 x 12 | 44 | Long flat items, prints, frames |
Sizes and ratings are for reference, not a stock list. Used boxes may not perform like new ones, so ask the supplier for rated capacity. Availability depends on partner suppliers.
The flute profile affects how a single wall box performs. Each one offers a different balance of cushioning, stacking strength, and printing quality. Heights and counts are approximate.
| Flute Type | Height | Flutes/ft | Cushioning | Stacking | Print Quality | Best Applications |
|---|---|---|---|---|---|---|
| A-Flute | 5mm (3/16") | 33-36 | Excellent | Good | Fair | Fragile items, cushion-critical shipments |
| B-Flute | 3mm (1/8") | 47-52 | Good | Very Good | Very Good | Retail displays, canned goods, die-cut boxes |
| C-Flute | 4mm (5/32") | 39-43 | Very Good | Very Good | Good | General shipping, most common all-purpose flute |
| E-Flute | 1.5mm (1/16") | 90-96 | Fair | Good | Excellent | Mailers, pizza boxes, lightweight retail packaging |
| F-Flute | 0.8mm (1/32") | 120+ | Limited | Fair | Excellent | Micro-corrugated packaging, cosmetic boxes, jewelry |
Fluting is the wavy layer sandwiched between the two flat liners of corrugated board. It works on the same principle as an arch: the curved shape spreads force across the structure. When a box is compressed from the top (stacking), the flutes bear the load vertically. When the box receives an impact from the side (dropping), the flutes act as springs, absorbing and distributing the energy across the entire wall rather than concentrating it at the impact point. This is why corrugated board can protect products from both compression and shock simultaneously.
In a standard RSC (Regular Slotted Container) box, the flutes run vertically when the box is standing upright. Vertical flutes help stacking strength because the arches line up with the force of gravity. Stack boxes the right way up to keep that benefit.
Single wall boxes turn up in nearly every line of work. Here is how different sectors use them and which sizes are common.
Online sellers often use a handful of standard sizes to cover their range. Cleaner boxes suit customer-facing deliveries.
Roasters, bottle shops, and specialty producers ship sealed, already-packaged goods in single wall boxes. Used boxes are not a fit for direct food contact.
Books are heavy for their size, so smaller boxes are easier to lift and less likely to be overloaded.
Clothing is light and not fragile, so single wall is a natural fit. Outer box condition matters less when products are individually poly-bagged inside.
Routers, small printers, and accessories can ship in single wall boxes with suitable cushioning.
Cosmetics and personal care brands use small single wall boxes for subscription and direct-to-consumer shipping. E-flute gives a thinner, neater look.
Artists and makers across Portland protect ceramics and handmade goods in single wall boxes with good padding.
Print shops and business services use single wall boxes for paper, toner, and promotional materials.
Nurseries and seed companies ship bulbs, seed, and supplies in single wall boxes, often with ventilation for live goods.
Use this guide to work out what to ask for. Consider these four factors in order.
Measure your product at its widest, tallest, and deepest points, and allow room for cushioning on every side. If shipping multiple items, lay them out and measure the combined footprint. Oversizing wastes material and can add dimensional weight charges, while undersizing risks damage. Aim for a snug fit with cushioning on all six faces.
32 ECT is the common single wall rating, and 44 ECT is a stronger grade. If your product has sharp edges or concentrated weight, or boxes will be stacked on pallets, ask about a stronger grade or double wall. Ask the supplier for rated capacity for your load.
C-Flute is a sensible default for general shipping. Choose B-Flute for a better printing surface or a thinner profile. Choose E-Flute for lightweight mailers and neat retail packaging. A-Flute is less common in standard shipping but offers more cushioning.
Like New or Good for customer-facing shipments where appearance matters. Fair for warehouse storage and internal transfers. Used for non-shipping jobs like storage and packing material. Partner suppliers may describe condition in their own terms, so confirm before you order.
What the common terms mean, and how the ratings usually pair up. Used boxes may not perform like new ones, so treat printed ratings as a starting point.
| Term | Common Pairing | What It Tells You |
|---|---|---|
| ECT (Edge Crush Test) | 32 ECT, 44 ECT | Edgewise crush strength of the board; relates to stacking strength |
| Burst (Mullen) | 200 lb, 275 lb | Pressure the board takes before rupturing; relates to puncture resistance |
| Equivalent Grades | 32 ECT with 200 lb; 44 ECT with 275 lb | Boxes are usually rated one way or the other, and these are widely treated as equivalents |
| Box Maker's Certificate | Printed on the box | Stamp showing the maker's stated ratings, where a box has one |
Ask the supplier for rated capacity for the box you are quoted.
Send a free, no-obligation quote request and a partner supplier follows up. Availability depends on partner suppliers.