Print this page Double-check scale Fold the ruler

Preparing the ruler

Print this page

Without scaling, at 100%.

Double-check scale

By measuring against a standard mm ruler, or the credit card diagram below.

Credit card length

Fold the ruler

Along the dotted line.

FOLD

0 10 20 30 40 50 60 70 80 90 100

5

15

25

35

45

55

65

75

85

95

95

85

75

65

55

45

35

25

15

5

100 90 80 70 60 50 40 30 20 10 0

Using a mirror

Using a friend

FOLD

For step by step instructions go to or scan this QR code with your mobile devices camera

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