The Helix Folding Ruler 30cm/300mm in blue is a practical and space-saving measuring tool, ideal for students and professionals. Crafted from durable plastic, this ruler features a snap-fit hinge that allows it to fold neatly in half, reducing its length to 15cm for easy storage in pencil cases or bags. When unfolded, it extends to a full 30cm (300mm), providing precise measurements with clear metric graduations in centimetres and millimetres. The transparent blue design adds a touch of style while ensuring visibility of underlying work. Designed for convenience and accuracy, this folding ruler is a reliable addition to any stationery collection.