Example Sentences
I can see a Ruler.
The Ruler is a stationery.
Ruler helps me learn a real-world English word.
How Big Is a Ruler? Average Size in cm & Worksheet
Stationery
Quick answer
Ruler is about 3.0 mm tall, 3.5 cm wide, and 30.0 cm deep.
Height answers the common “how tall is a Ruler?” search. Width and depth help explain the full real-world size.
Start free with one worksheet. Upgrade when you need the full printable lesson pack, levels, notes, and answer key.
Size Comparison
Click "Add Object" to compare
Visual English Lesson
Ruler
A ruler is a flat 30 cm strip for measuring and drawing lines.
Mini Quiz
Which measurement tells how tall it is?
Free 3-minute practice
- Ages 6-8 practice
- Mixed pack activity
- A quick word, sentence, quiz, and drawing task
- Good for one short home or tutoring activity
Free Printable Pack
Want this as a full printable Ruler lesson?
The complete pack — levels, answer keys, adult notes, science prompts, and a reusable printable flow — is free for everyone. Print it or save as PDF, no account needed.
Same object, three learner levels
Use easier or harder versions for ages 3-5, 6-8, and 9-11.
A full printable pack, not one loose page
Vocabulary, quiz, size science, drawing task, and answer key together.
Ready for a weekly routine
Turn object pages into repeatable English and science practice.
Instructions for the adult
Parent and teacher notes make it usable at home, tutoring, or class.
About Ruler
A ruler is a flat 30 cm strip for measuring and drawing lines.
Size Overview
A Ruler is about 3 mm tall, 4 cm wide, and 30 cm deep. A ruler is a flat 30 cm strip for measuring and drawing lines.
3.5 cm
Width
3.0 mm
Height
30.0 cm
Depth
🧒 For Kids
A ruler helps you draw perfectly straight lines!
Frequently Asked Questions
More Stationery sizes
Explore the real size of related objects.
