Lucky Ruler

From the website:

Lucky Ruler

Thirteen — we do everything in our power to avoid this number.

Yet on every ruler we come across it neatly sits there, snug between the innocent numbers twelve and fourteen.

In turn, provocatively staring us in the face.

Consequently, this ruler doesn't include that unlucky number.

With this product by your side you simply can’t fail.

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$20 CAD (click on "Desk and Stationary"," then scroll down).