Plastic Rulers | McMaster-Carr

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283 Products

About High-Quality Rulers

What separates a throwaway ruler from one you’ll keep for decades, which type is best for everyday use, and how to compare materials.

Rulers

Horizontal Rulers

Adhesive-Back Rulers

Permanently stick to surfaces for repeated, hands-free measuring

119 products

See-Through Rulers

Made of clear plastic, so you won't lose sight of what you're measuring

6 products

Folding Rulers

Combine the rigidity of a ruler with the portability of a tape measure

3 products

Magnetic Rulers

Measure hands-free without permanently mounting a ruler

3 products

Magnetic Ruler Sets

Keep multiple lengths on hand so you always have the size you need

1 product

Vertical Rulers

Adhesive-Back Vertical Rulers

Stick to walls and tanks for repeated, hands-free height and depth measurements

48 products

Rulers for Floors

Take repeated measurements of objects too heavy or too long to lift onto a workbench

9 products

Scale Rulers

Drafting Rulers

Sketch buildings, roads, and other life-size objects to scale

5 products

Half-Measure Adhesive-Back Rulers

Take division out of the equation when building half-scale models and prototypes

14 products

Half-Measure Adhesive-Back Vertical Rulers

Measure height while building half-scale models and prototypes—no division required

4 products

Other Products

Staff Gauges

Typically mounted to walls and tanks for measuring the level of liquids, such as water, fuel, and oil

14 products

Tape Measures

Standard, long, center-finding, and flexible tape measures

15 products

Protractors

Set bevels and measure angles with everything from pocket-size to long-arm protractors

20 products

Map Distance Measuring Tools

Slide across maps and blueprints to measure distances

4 products

Drafting Curves

Use as templates for drawing curved lines

2 products

Squares

Check 90° angles during layout work with combination, angle, or pipefitters' squares

3 products

Magnifiers

Workstation, hand-held, headband, and eyeglass magnifiers

1 product

Leveling Rods

Use with sight levels to estimate the distance between you and a given object

3 products

Liquid-Level Tape Measures

Lower into deep containers, such as tanks, to check the level of oil and other fluids

3 products

Calipers

Take inside, outside, and depth measurements with more precision than a ruler

5 products