Metal ruler 15/20/30 cm

Measure in both systems

You get a dual scale ruler with centimeters on one edge and inches on the other, so you can switch between metric and imperial without doing the math. The marks are laid out for precise reads, whether you're checking a sketch, trimming paper, or sizing a margin.

Pick the length you need

Choose 15 cm for a pencil case, 20 cm for everyday desk use, or 30 cm when you want more reach across a page. The smaller sizes tuck away easily. The 30 cm version gives you a longer straightedge for larger layouts.

Use it for clean lines

Set it down for homework, crafts, or quick office jobs when you need a straight edge you can trust at a glance. The scale stays simple to read, so your hand can stay on the page and not on the measuring conversion.