If you are new to the packaging field, you must be wondering why the whole blog revolves around “Dimensions”? Well, allow me to introduce you to this new topic—the importance of Parcel Box Dimensions!

The dimensions/sizes are important because they affect everything. From cost to protection, stacking, storage—dimensions impact everything.

Large boxes take more space and add to the cost; thicker boxes are heavier, hence add to the cost.

A box not provide the perfect fit to the product would either provide the product enough space to move around inside and damage itself, or be too congested to crush the product.

For multiple products, the product dimensions are required to design inserts, and the box size must be increased, keeping in mind the insert thickness.

You see? The box and product dimensions are very crucial in the packaging field. Here is a guide for you that explains What To Do in the simplest ways…👇

Step	What To Do	Quick Tip
1	Place the box on a flat surface	Keep it squared, not squeezed
2	Identify the opening face (top)	Measure from the top view first
3	Measure Length (L) = the longest side of the opening	Always take the longest side as L
4	Measure Width (W) = shorter side of the opening	W is the side next to L
5	Measure Height (H) = base to top (depth)	Measure vertically at the corner
6	Write dimensions as L × W × H	Example: 12 × 9 × 6 in
7	Confirm internal vs external size	Internal = fit, external = shipping
8	Recheck with a second measurement	Small errors change shipping tiers
9	Use the same unit everywhere	Inches or cm—don’t mix units
10	If it has flaps, close them before measuring	Measure in “shipping-ready” form

Standard Parcel Box Sizes

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Furthermore, you can also look for the standard sizes in the market.

Small Parcel Boxes: 6 x 4 x 4 inches
Medium Parcel Box: 12 x 9 x 6 inches
Large Parcel Box: 18 x 14 x 12 inches
Extra Large Parcel Box: 24 x 18 x 18 inches

Please note: the sizes might vary from vendor to vendor or place to place. You must confirm with the vendor or share your references before placing the order.

Let’s Begin From The Start: What Are Parcel Boxes?

Parcel boxes, as the name suggests, are specialty boxes made to send parcels. Every parcel holds something expensive, fragile, or special. For your special items, you need special packaging that matches their aesthetics, as well as providing effective protection throughout the journey.

Parcel boxes are also known as Mailer Boxes, for the same reasons. You can add layers to increase their functionality, as well as colors to make them attractive.

How Are Parcel Boxes Manufactured?

Parcel boxes are made from Corrugated stock. It is thick paperboard made from layers of paper sheets combined to provide effective product protection.

A fluted (curvy/corrugated) middle layer sandwiched between flat paper layers—corrugated boxes are best for marketing and shipping.

The corrugated layer has air bags between the curves that trap air and provide cushioning and insulation. No need to worry about external pressures, as corrugated boxes would absorb the pressure and keep the product inside safe.

Furthermore, the flat outer layer acts as a canvas for high-quality print results. The surface is smooth, which lets the inks stay on it longer and allows them to express themselves boldly and completely.

Besides, you can also add some coatings or laminations to the surface to give it a shine and to secure the prints from fading, as well as reinforcing the box, making it more moisture-resistant.

Common Flute Types

Furthermore, there are five flute types that you need to know:

A Flute: Heavy-duty, cushioning
B Flute: Retail and die-cut boxes
C Flute: General shipping boxes
E Flute: Printed retail packaging
F Flute: Premium packaging

Each flute type offers a different level of thickness and strength, increasing from A to F, allowing businesses to choose based on their packaging requirements. From small to large, or medium parcel cardboard boxes—we have got your back!

How To Measure Each Flute?

Here is the difference between parcel boxes and how to distinguish them 👇

Flute Type	How To Measure It (Simple Way)
A Flute	1) Look at the sheet edge. 2) Measure 1 inch along the edge with a ruler. 3) Count the “wave peaks” in that 1 inch. 4) Also measure total board thickness with a caliper to confirm it’s the thickest single-wall flute.
B Flute	1) Measure 1 inch on the edge. 2) Count peaks (you’ll see more peaks than C, fewer than E). 3) Use a caliper for thickness—medium-thin compared to A/C.
C Flute	1) Measure 1 inch on the edge. 2) Count peaks (usually fewer than B, more open waves). 3) Check thickness with a caliper—between A and B.
E Flute	1) Measure 1 inch on the edge. 2) Count peaks (you’ll see many tight waves). 3) Caliper check—thin board, often used for better print and compact cartons.
F Flute	1) Measure 1 inch on the edge (or ½ inch if waves are too tight). 2) Count peaks and scale up if needed. 3) Caliper check—very thin, very fine waves.

Add Layers To Add To The Functionality

You can increase the layers of paper to increase the strength and thickness of your cardboard parcel boxes. Based on the number of corrugated sheets added, these boxes are named as Single Wall Corrugated Box, Double Wall Corrugated Box, and Triple Wall Corrugated Box.

For your Single-Wall Corrugated Box, there are 3 layers:

1 outer liner
1 fluted middle layer
1 inner liner

Whereas, for the Double-Wall Box, there are 5 layers:

1 outer liner
1 fluted medium
1 middle liner
1 fluted medium
1 inner liner

And for the Triple Wall Box, there are 7 layers:

1 outer liner
1 fluted medium
1 liner
1 fluted medium
1 liner
1 fluted medium
1 inner liner

The outer liner provides a smooth surface for printing and labelling. The middle corrugated/fluted liner provides cushioning and strength. And the inner liner supports the structure and maintains the box shape.

The more the fluted layers, the more the cushiony effect, cancelling out stress and providing a reliable shipping experience to your fragile products.

How To Save Money When Buying Your Parcel Boxes?

Be the Smart Parcel Box vendor by making a smart purchase. Buy parcel boxes Wholesale to get more for less. When you buy parcel boxes in bulk, you get more in one shipment rather than small quantities in different shipments. This will not just reduce the shipping charges, but will also reduce the carbon footprint.

Not just that, but when you buy more than what you need, you give yourself the chance to be prepared for the unseen. Imagine yourself in a situation where you get a sudden, large, rush order? What would you do if you had nothing in stock? You would have to refuse the opportunity.

But what if you have more than enough? You will be able to grab the opportunity. If there are days that disappoint you, there are days that surprises ou. Be prepared for the unseen by always having more than what you need. Because you will never be wasting any boxes, they will be used anyway.

Do Not Just Fit Around The Product — Fit In With Style

Outshine your competitors with custom printed parcel boxes. Decorate them in any theme or color to make a statement and to leave a lasting impression. Here is how you can do that 👇

Customisation Category	Options You Can Add	Best Used For
Printing Options	1–2 color print, full CMYK, inside print, single-panel vs full-wrap	Branding, instructions, unboxing detail
Coating Options	Matte coat, gloss coat, scuff-resistant coat, splash-resistant coat	Cleaner surface during handling
Finishes	Spot UV highlights, emboss/deboss, foil accents, soft-touch feel	Premium look and shelf impact
Opening & Closure Features	Tape seal, peel & seal strip, lock tabs, tuck flap, tear strip, finger notch, perforation line	Fast packing, secure sealing, easy opening
Insert Options	Dividers, partitions, corrugated pads, corner protectors, custom insert trays	Stops movement, protects fragile items
Reinforcement	Double base, reinforced corners, edge support	Heavy loads, stacking strength
Add-Ons & Utility Features	Handle cutout, ventilation holes, window cutout, extra adhesive strip, security seal zone, inner message panel	Convenience, security, better presentation
Handling Markings	Fragile icons, orientation marks, “keep dry” symbols	Fewer carrier mistakes
Sustainability	Recycled content, FSC board, water-based inks	Eco targets and compliance
Design Ideas	Minimal logo layout, clean shipping mark style, seasonal theme, dark premium look, mascot theme, QR info layout	D2C brands, campaigns, subscription boxes

Where To Buy Parcel Boxes Online?

If you are looking for parcel boxes that speak your language, find your parcel box near me—at TheCosmeticBoxesUK. Here, you will get all that you need—all under one roof. From manufacturing materials to customisation options—we have got your back! And not just that, we also provide you with the assistance of our team of experts.

So, what are you waiting for? Place your orders NOW!!!