Ruler Corex 300 mm Plastic, blue and purple — 300 mm measurement, mm scale

Corex 300 mm Plastic ruler in blue and purple is a 30 cm straight-edge measuring tool with a clear millimetre scale. The lightweight yet rigid plastic construction provides a stable reference for drawing straight lines, measuring small distances and performing routine school or office tasks. The compact length fits standard geometry sets and is convenient to carry in pencil cases or desk drawers.

Advantages

The ruler combines a full 300 mm measurement with an accurately printed mm scale for precise small-scale measurement. Its plastic material balances stiffness and lightness, reducing bending during use while remaining easy to handle. Contrasting blue and purple colours improve visibility on paper and help distinguish the tool among other stationery. The smooth edges enable consistent straight-line drawing and basic cutting guidance when used with care.

Suitable for

• School geometry and math exercises
• Technical sketches and quick measurements
• Crafting, layout and hobby projects
• Office measuring tasks and document work

Key specifications

• Length: 300 mm (30 cm)
• Scale: millimetre gradation throughout
• Material: rigid plastic
• Colors: blue and purple
• Edges: straight, smooth for drawing and guiding cuts

How to use

Place the ruler flat against the paper or workpiece with the zero mark aligned to the starting point of the measurement. Read the required millimetre or centimetre value from the printed scale while keeping the ruler steady to avoid parallax errors. Use the straight edge to draw lines by holding the ruler firmly in position and guiding the pencil or pen along the edge. When using the ruler as a cutting guide, apply light, controlled pressure and use a suitable cutting tool to avoid damaging the ruler.

Usage recommendations

Store the ruler flat or in a pencil case to prevent warping. Clean the printed scale with a soft cloth to maintain visibility. Avoid exposing the plastic to high heat or harsh solvents, which can deform the material or fade the scale markings.