Paper size

High school (ages 12+)
Making & Design

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/paper-size

1. How big is Paper size?
2. What is the ISO 216 system origin?
3. What is the envelope standard?
4. What is the A series of paper sizes and why do they stay the same shape when cut in half?
5. Why do some countries use Letter size instead of A4?

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. How big is Paper size?Defined as exactly 1 square meter
2. What is the ISO 216 system origin?Proposed in the 18th century in Germany, formalized internationally in 1975
3. What is the envelope standard?ISO 269 standard for envelopes, including the C series
4. What is the A series of paper sizes and why do they stay the same shape when cut in half?The A series uses a special ratio of about 1 to 1.414. When you cut a sheet in half along its short side, the two halves keep the same shape. This lets you make many sizes that all look the same.
5. Why do some countries use Letter size instead of A4?In North America, people use Letter size (8.5 by 11 inches) because it was chosen by government offices and businesses. It isn’t based on the √2 rule, so it looks a little different from A4.

ISO 216: The international standard defining paper sizes, characterized by its consistent aspect ratio and scaling properties.