McMaster-Carr logo
    Forward
    Enter e-mail addresses in the fields below
    Message
    Cancel
    Print
    How can we improve?
    Comments
    E-mail address (if you would like a response)
    20 Products
    About High-Quality Rulers
    industrial info icon

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

    Folding Rulers

    Combine the rigidity of a ruler with the portability of a tape measure. A favorite among carpenters, these rulers stay straight even when extended up to 6 ft., then fold up to the length of a phone to tuck into your tool belt. Bend them at their joints to draw angles and measure corners.
    Wood
    Image of Product. Front orientation. Rulers. Folding Rulers, Wood.
    Image of Product. Front orientation. Rulers. Folding Rulers, Wood, Rulers with Extension.

    Rulers with Extension

    For those who prefer the warm look and feel of wood, these rulers are a classic choice. Just be sure to keep them dry, since moisture can cause them to warp and crack. To keep them turning smoothly, their joints are brass plated to guard against wear and rust. Brass caps cover their ends, so they won’t splinter.
    Rulers with Extension—Measure the inside of objects, such as drawers, where a standard folding ruler would either be too long or too short. These rulers have a sliding extension, so you can lengthen the ruler to fit within the object you're measuring.
    Extension
    Lg.
    Unfolding Direction
    Front Graduations (Numeric Graduations)
    Back Graduations (Numeric
    Graduations)
    Wd.
    Thk.
    Lg.
    Material
    Color
    Each
    Rulers
     
    Inch—Left-to-Right Reading Direction
    6 ft.From Front1/16" (1"), 1/16" (1")—5/8"9/64"——White19365A28000000
    6 ft.From Front/From Back1/100 ft. (1/10 ft.), 1/100 ft. (1/10 ft.)1/16" (1"), 1/16" (1")5/8"9/64"——White1989A100000
    6 ft.From Back1/16" (1"), 1/16" (1")1/16" (1"), 1/16" (1")5/8"9/64"——White19365A2900000
     
    Inch/Metric—Left-to-Right Reading Direction
    6 1/2 ft./2 mFrom Front/From Back1/16" (1"), 1/16" (1")1 mm (1 cm), 1 mm (1 cm)5/8"9/64"——White19365A2700000
     
    Rulers with Extension
     
    Inch—Left-to-Right Reading Direction
    6 ft.From Front/From Back1/16" (1"), 1/16" (1")1/16" (1"), 1/16" (1")5/8"9/64"6"BrassBrown19365A2100000
     
    Fiberglass
    Image of Product. Front orientation. Rulers. Folding Rulers, Fiberglass.
    Image of Product. Front orientation. Rulers. Folding Rulers, Fiberglass, Rulers with Extension.

    Rulers with Extension

    The choice for wet and outdoor environments, these rulers won't warp, fade, or crack if rinsed or rained on. Their joints snap into place when you bend them 90°, so they stay rigid as you measure and draw right angles.
    Rulers with Extension—Measure the inside of objects, such as drawers, where a standard folding ruler would either be too long or too short. These rulers have a sliding extension, so you can lengthen the ruler to fit within the object you're measuring.
    Extension
    Lg.,
    ft.
    Unfolding
    Direction
    Front Graduations (Numeric
    Graduations)
    Wd.
    Thk.
    Lg.
    Material
    Color
    Each
    Rulers
     
    Inch—Left-to-Right Reading Direction
    6From Front1/16" (1"), 1/16" (1")5/8"1/8"——Yellow19365A33000000
    6From Back1/16" (1"), 1/16" (1")5/8"1/8"——Yellow19365A3200000
     
    Rulers with Extension
     
    Inch—Left-to-Right Reading Direction
    6From Front1/16" (1"), 1/16" (1")5/8"1/8"6"PlasticYellow19365A3100000
     

    Folding Staff Gauges

    Image of Product. Front orientation. Staff Gauges. Folding Staff Gauges.
    Fold these vertical rulers for convenient storage and transport. They're varnished to resist gasoline, diesel fuel, and oil.
    Graduation
    Length
    Overall
    Lg.
    Folded
    Lg.
    Front Left Graduation Marks
    (Numeric Increments)
    Front Right Graduation Marks
    (Numeric Increments)
    Wd.
    Thk.
    Color
    Color
    Type
    Each
    Inch—Bottom-to-Top Reading Direction
     
    Varnished Wood
    8 ft.9 1/2 ft.3.7 ft.1/8" (1")1/8" (1")7/8"5/8"BrownBlackPrinted1923A54000000
    10 ft.12 1/2 ft.4.7 ft.1/8" (1")1/8" (1")7/8"5/8"BrownBlackPrinted1923A5500000
    12 ft.14 1/2 ft.4.3 ft.1/8" (1")1/8" (1")7/8"5/8"BrownBlackPrinted1923A5800000
    14 ft.15 1/2 ft.5.7 ft.1/8" (1")1/8" (1")7/8"5/8"BrownBlackPrinted1923A5600000
    15 ft.16 1/2 ft.4.7 ft.1/8" (1")1/8" (1")7/8"5/8"BrownBlackPrinted1923A5700000
    16 ft.18 ft.6.4 ft.1/8" (1")—7/8"1/2"BrownBlackEmbossed1923A2400000
    19 ft.21 ft.7.4 ft.1/8" (1")—7/8"1/2"BrownBlackEmbossed1923A2500000
    22 ft.24 ft.8.4 ft.1/8" (1")—7/8"1/2"BrownBlackEmbossed1923A2600000
     
    Metric—Bottom-to-Top Reading Direction
     
    Varnished Wood
    2.4 m2.9 m1.2 m0.5 cm (1 cm)0.5 cm (1 cm)7/8"5/8"BrownBlackPrinted1923A2100000
    3.6 m4.4 m1.4 m0.5 cm (1 cm)0.5 cm (1 cm)7/8"5/8"BrownBlackPrinted1923A2200000
    4.5 m5 m1.5 m0.5 cm (1 cm)0.5 cm (1 cm)7/8"5/8"BrownBlackPrinted1923A2300000
    6.7 m7.3 m2.6 m0.5 cm (1 cm)—7/8"1/2"BrownBlackEmbossed1923A2700000
     
    back to top