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Standard Tubing Sizes Chart - OEM Metal & Steel Tubing

steel tube sizing chart tubing sizes chart

This tubing sizes chart contains all the basic info you need to specify various types of metal tubing. Download the full chart here for a complete list of sizes.

If you have any questions about tubing sizes or this chart, feel free to contact us directly.

Tubing Sizes Chart

Below is your metal tubing sizing chart -- just click the shiny, orange button below to get a free PDF version you can download and take with you.

Download Full Chart Here

Or, you can just peruse the info below!

Standard Tubing Shapes

These shapes include:

  • Round
  • Oval
  • Square
  • Rectangular
  • "D"

However, we can manufacture any shape and size with a strip width of 8" or less. Common non-standard shapes include triangular, hexagonal, and shapes with inverted corners.

Outer Dimensions

Tubing is specified by outer dimensions, while pipe is specified by schedule/nominal thickness. Read more about the difference between tube and pipe here.

Outer dimensions range from .5" to 2.5". Outer dimension refers to the diameter of the tube starting at the outer wall.

Available widths will vary by tube shape.

Related: Embossing Process Saves Client Thousands

Steel Tube Thickness

Wall thickness, or gauge, indicates the thickness of a tube's wall.

Wall thickness affects the strength, weight, and formability of a tube. Thickness ranges from .024" to .085". Available gauge options typically varies depending on the tube shape and dimension you want. Wall thickness is commonly measured in inches or millimeters, while gauge is a standard integer (i.e. 18 gauge).

Requirements vary by application, so you may be able to cut costs by optimizing your tubular steel product design.


Density and weight are important for accurate total cost calculations -- including shipping costs. If you need a certain amount of strength for your part but have weight or cost restrictions, your manufacturer can work with you to find a solution.

Weight is measured in pounds per foot. This number indicates the heaviness of a tube using outer dimension and gauge.

Here are the stats for some popular types of metal tubing (Key: OD = outer dimension; WT = wall thickness; LS = long side; SS = short side)

Types of Metal TUbing

Mild Carbon Steel

  • Density: .284 lb./cubic in.
  • Round tubing weight: 10.7 x (OD - WT) x WT
  • Square weight: 13.63 x (OD x WT) x WT
  • Rectangular weight: 13.63 x [(LS + SS / 2) - WT] x WT

304 Stainless Steel

  • Density: .289 lb./cubic in.
  • Round tubing weight: 10.93 x (OD - WT) x WT
  • Square weight: 13.92 x (OD x WT) x WT
  • Rectangular weight: 13.92 x [(LS + SS / 2) - WT] x WT

6061 Aluminum

  • Density: .098 lb./cubic in.
  • Round tubing weight: 3.69 x (OD - WT) x WT
  • Square weight: 4.704 x (OD x WT) x WT
  • Rectangular weight: 4.704 x [(LS + SS / 2) - WT] x WT

If this is your first time designing or specifying tubing metal fabrication, you should be familiar with how outer dimensions, wall thickness, and weight affect manufacturing and your end product. 

Related: Comprehensive Tube Bending Design Guide

Tube sizing and capabilities will vary by manufacturer. If you don't see the size or shape you need, we can accommodate special requests or assist in standardizing your design.

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(Editor's Note: This article was originally posted in April 2017 and was recently updated.)

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