Bonewright Rulers
Dec 5, 2025
Rev D-4
Rule of Thirds
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alt="thirds of an inch ruler"
The Rule of Thirds ruler measures in 1/3", 1/6", 1/9" and 1/12" increments.
The Rule of Thirds ruler let's you draw in 1:3 scale effortlessly.
The Rule of Thirds ruler let's you divide distances into three equal parts with ease.
The Rule of Thirds is a great hands-on aid for teaching fractions of threes .
The Rule of Thirds is sold exclusively on Amazon.
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Great Divide Spacing Ruler
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alt="Spacing Ruler Front"
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alt="Spacing Ruler Back"