Hobonichi Stencil - Speech Bubbles is a translucent light yellow mini stencil that is perfectly designed to fit in the pocket of a Hobonichi Techno cover.  It allows you to trace out some shapes that look like speech bubbles.  It has an 8.5 cm ruler along one side and a 3.7mm grid. 

Dimensions: 9.4 cm x 6.3cm x 0.1 cm