Rule Straightedges | McMaster-Carr

	System of Measurement System of Measurement

	Length Length

	Width Width

	Material Material

	Graduation Marks Graduation Marks

	Numeric Increments Numeric Increments

	Color Color

	Silver		Blue
	White		Black
	Yellow		Red
	Clear		Brown
	Gold

	Reading Direction Reading Direction

	Flexibility Flexibility

Flexible

Rigid

	Graduation Color Graduation Color

	Black		White
	Silver		Black and Red
	Red

	Graduation Mark Style Graduation Mark Style

Etched

Printed

	Thickness Thickness

	Graduation Location Graduation Location

	Orientation Orientation

Horizontal

Vertical

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	For System of Measurement For System of Measurement

Inch

Metric

	Certification Certification

NIST Calibration Certificate

NIST Calibration Certificate
with Test Data

	Segment Length Segment Length

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	Finish Finish

Satin Chrome

Titanium Nitride (TiN) Coated

Varnished

Porcelain Enamel

	Backing Material Backing Material

Adhesive

Cork

	Hole Diameter Hole Diameter

687 Products

Rulers

Corrosion-Resistant Stainless Steel Rulers

Made to last, our most corrosion-resistant rulers are stainless steel and have wear-resistant etched markings.

Certified Corrosion-Resistant Stainless Steel Rulers

A calibration certificate traceable to NIST is included with these stainless steel rulers.

Lightweight Aluminum Rulers

Made of aluminum, these rulers are an economical alternative to stainless steel rulers.

Certified Lightweight Aluminum Rulers

Ensure accurate measurements with these certified rulers.

Easy-to-Read High-Contrast Rulers

Numbers and graduations etched in light colors are easy to see on a black background.

Easy-to-Read Rulers with Bold Markings

Rulers have large numbers and deeply etched graduations.

Transparent Rulers

Keep your workpiece in view as you measure with these see-through rulers.

Wood Yardsticks

Made of wood with a clear protective coating, this ruler is an economical choice for measuring objects up to three feet long.

Wood Rulers

A clear protective coating and brass endcaps add durability to these hard-maple rulers.

Nonslip Rulers

A cork back prevents slipping and protects delicate surfaces.

High-Accuracy Rulers

An economical alternative to Starrett High-Accuracy Rulers, these provide reliable, repeatable measurements.

Certified High-Accuracy Rulers

These rulers include a certificate of calibration traceable to NIST with test measurements that confirm accuracy.

Starrett High-Accuracy Rulers

Also known as machinists’ rules, these rulers ensure reliable, repeatable measurements.

Starrett Certified High-Accuracy Rulers

Ensure reliable, repeatable measurements with these rulers.

Starrett High-Accuracy Rulers with Hook

A reversible, removable hook grabs the edge of an object for easy alignment.

Scratch-Resistant High-Accuracy Rulers

Protect your ruler from scratches and wear with a TiN (titanium nitride) coating.

Magnetic High-Accuracy Rulers

High-powered magnets hold these rulers in place.

Adhesive-Back Rulers

Permanently mount these rulers to a machine or workbench.

Half-Measure Adhesive-Back Rulers

Use to find diameters and centers.

Pocket Rulers

Rulers are narrow and just 6" long to measure in tight spaces.

Starrett Tapered-End Pocket Rulers

At just 6" long with a tapered end, this ruler fits into tight spots.

Folding Rulers

Fold these rulers for convenient storage and transport.

Long-Length Rulers

Create a ruler up to 192" long by adding continuous segments.

Adhesive-Back Vertical Rulers

Permanently mount these rulers on machines, tanks, and walls to measure heights and depths.

Adhesive-Back Vertical Rulers for Floors

These extra-thick rulers have a polycarbonate coating that resists wear from traffic and chemicals.

Half-Measure Adhesive-Back Vertical Rulers

The graduations on these rulers are half the actual length of the object you are measuring.

Vertical Rulers

Measurements are printed from top to bottom for measuring heights and depths.

Vertical Rulers with Hook

A hook grabs the edge of an object for easy alignment.

Long-Length Vertical Rulers

Use to measure heights and tank levels.

Center-Finding Rulers

Zero marks the center when these rulers are positioned so the same number touches each side of an object.

Circumference Rulers

Determine the circumference of a circle without calculations.

Printers' Pica Rulers

Rulers are marked with picas for working with type.

Flexible Magnetic-Back Tape Measures

Flexible Magnetic-Back Tape Measure Sets

Attach to curved or flat steel surfaces.

Flexible Magnetic-Back Tape Measures

Attach to curved or flat steel surfaces.

Tank-Level Rulers

Adhesive-Back Tank-Level Rulers

Permanently mount these vertical rulers to walls and tanks.

55-Gallon Drum-Level Rulers

Measure volume in gallons without calculations.

Tank-Level Rulers

Built to resist corrosion and last in harsh environments, these vertical rulers are iron with a porcelain-enamel finish. Mount them to walls and tanks.

Tank-Level Folding Rulers

Fold these vertical rulers for convenient storage and transport.

Long-Length Tank-Level Rulers

Connect continuous segments to create a ruler up to 10 ft. long.

Diameter Identifiers

Measure the outside diameter of small round- and hex-shaped objects such as rods, drill bits, bolts, and tubing with this pocket-size tool.

Straightedges and Drafting Rules

Rolling Parallel Rules

A rule, compass, protractor, and template all in one tool.

Architects’ and Engineers’ Scales

Take measurements off of scaled architectural or engineering drawings with these specialized scales.

Magnifying Bars

These plastic bars have a magnified center; their edges are marked with graduations.

Levels with Rulers

Align and measure at the same time with these levels that have rulers on the front and side.