How to Properly Write Dimensions: Length, Width, and Height Order

Understanding the correct order when writing dimensions is essential for clear communication in industries ranging from manufacturing to shipping. The standard convention follows a specific sequence: length, width, and height (or depth). This article explains how to properly write dimensions, why the order matters, and how different industries might use variations of this standard.

Standard Dimension Order: The LxWxH Convention

The most widely accepted convention for writing dimensions is length × width × height, with the measurements in that specific order. This is often abbreviated as L × W × H or simply written with the multiplication symbol (×) between values.

For example, a box measuring 10 inches long, 8 inches wide, and 6 inches high would be written as:

• 10" × 8" × 6"
• 10" L × 8" W × 6" H
• 10 in. × 8 in. × 6 in.

This standard ordering helps prevent confusion when communicating measurements across different contexts. Understanding the correct order of dimensions ensures consistency in manufacturing, shipping, and product specifications.

Why Dimension Order Matters: Consistency and Clarity

Following the standard length, width, height order matters for several important reasons:

Avoiding Costly Mistakes

In manufacturing and packaging, incorrect dimension interpretation can lead to production errors, wasted materials, and delays. For instance, when ordering custom packaging, mixing up dimensions could result in containers that don't fit the product.

International Standardization

The LxWxH convention is recognized internationally, facilitating global trade and communication. As explained in this guide to dimensions, standardized notation reduces cross-border confusion.

Technical Documentation

Engineering drawings, architectural plans, and product specifications rely on consistent dimensional notation for accuracy and clarity.

Identifying Dimensions in Different Objects

Determining which measurement corresponds to length, width, or height can sometimes be confusing, especially with irregularly shaped objects.

Rectangular Objects

For rectangular objects like boxes or rooms:

• Length: Usually the longest horizontal edge
• Width: The shorter horizontal edge
• Height: The vertical measurement from bottom to top

Accurately measuring box dimensions requires identifying these three axes correctly.

Cylindrical Objects

For cylinders or tubes:

• Length: The measurement along the main axis
• Width/Diameter: The distance across the circular face

For example, when describing pre-rolled cone dimensions, manufacturers typically list the length first (e.g., 115mm), followed by the diameter at the opening.

Notation Formats and Symbols in Dimensional Writing

Several acceptable formats exist for writing dimensions:

Using Multiplication Symbols

The most common notation uses the multiplication symbol: 10" × 8" × 6"

Using Letters as Indicators

Adding dimension indicators: 10"L × 8"W × 6"H

Using Words

Spelling out the dimensions: 10 inches long by 8 inches wide by 6 inches high

As discussed in this guide to H × W × D format, some industries may use variations like height × width × depth, particularly in furniture and cabinet specifications.

Industry-Specific Conventions for Dimensions

While the LxWxH standard is widely accepted, some industries follow different conventions:

Construction and Architecture

Blueprints and floor plans often list width × depth × height, where depth represents the distance from front to back.

Shipping and Logistics

The shipping industry typically follows the length × width × height convention strictly, as this impacts freight calculations and container loading.

Furniture and Interior Design

Furniture specifications often use width × depth × height, where width is the measurement across the front, depth is from front to back, and height is from floor to top.

Understanding the difference between length and width in your specific industry context is crucial for accurate communication.

Practical Applications of Proper Dimensional Notation

Mastering how to write dimensions in the correct order has numerous practical applications:

Packaging Design

When designing packaging, precise dimensional notation ensures that products fit properly and packaging materials are ordered correctly. Understanding box dimensions is particularly important for efficient packaging operations.

Shipping Calculations

Carriers use dimensions to calculate volumetric weight and shipping costs. Incorrect dimension order can lead to unexpected shipping charges.

Manufacturing Specifications

Production processes rely on accurate dimensional information to create parts that fit together precisely.

Whether you're ordering custom packaging, designing a product, or simply communicating measurements, following the standard length, width, height order ensures clarity and prevents costly misunderstandings.