Fun Learning Ruler Set / Sonic

• Model: SN-868
• Ruler length: 18cm (B5 notebook compatible)
• Product dimensions: 70 × 194 × 10.5mm
• Package dimensions: 194 × 70 × 11mm
• Ruler material: PMMA (acrylic)
• Case material: PS (polystyrene)
• Includes: Ruler, name sticker
• Features: Margin scale lines, zero-start scale, color-coded design

Most school rulers pack every scale and marking onto a single strip with no visual separation, which means students spend time hunting for the right line rather than drawing it. Sonic's Fun Learning Ruler addresses that with a color-coded layout: each functional zone is visually distinct, so the margin scale lines and the zero-start measuring scale read as separate tools at a glance.

The 18cm length is not arbitrary. It matches the width of a standard B5 notebook page, which is the format used most often in Japanese elementary and middle school classrooms. That fit means the ruler doesn't hang over the edge or fall short when ruling margin lines across a full page. The included name sticker is a small practical detail that matters in a classroom where identical rulers end up in a pile.