The Slide Ruler from Midori is one we’ve use more than we intended in the TS office.
There is a slider for you measure the thickness of items, we often use this to make sure our letters are under 2cm for the postbox. Measure from 0.1mm to 120mm.
Made out of acrylic - choose between a transparent or black opaque version.
A little reminder to drink some water! 💧