This simple metric pocket stencil can help you to draw shapes on the go. The stencil is 10 cm by 5 cm insuring that it fits in your pocket.

Shapes:
5 mm circle

7 mm circle

10 mm circle

15 mm circle

20 mm circle

5 mm triangle

7 mm triangle

10 mm triangle

15 mm triangle

20 mm triangle

5 mm square

7 mm square

10 mm square

15 mm square

20 mm square

10 cm ruler

protractor with 90, 45, and 22.5 degrees marked