10 Things That Are 20 Centimeters Long (With Pictures)

Understanding the length of everyday objects is important in various situations, from measuring and estimating dimensions to choosing appropriate accessories or organizing spaces. In this beginner’s guide, we will explore ten common things that are approximately 20 centimeters long. By familiarizing yourself with these objects and their lengths, you’ll develop a practical understanding of the measurement of 20 centimeters. Let’s dive in and discover the world of 20 centimeter lengths!

1. Standard Ruler

A standard ruler typically measures 30 centimeters in length, making it a convenient tool to estimate and comprehend a 20-centimeter length. By using the markings on the ruler, you can easily identify and visualize the segment representing 20 centimeters.

2. Smartphone

Many smartphones have a length of around 15–18 centimeters, making them slightly shorter than 20 centimeters. However, when including a protective case or cover, the overall length can meet or exceed 20 centimeters. Being aware of this dimension can help you choose the right-sized accessories for your smartphone.

3. Notebook

A typical notebook, commonly used for writing or taking notes, often measures around 20 centimeters in length. Notebooks with standard dimensions allow for easy organization and storage, as well as comfortable writing surfaces.

4. Standard Laptop

Many laptops have widths ranging from 30 to 40 centimeters, making them larger than the 20-centimeter mark. However, slim and compact laptops or netbooks can closely approximate a length of 20 centimeters. Understanding this measurement helps when selecting bags or cases for your laptop.

5. Picture Frame

Standard picture frames come in various sizes, and finding one with a length of 20 centimeters is common. These frames are ideal for displaying small photographs or postcard-sized prints. Knowing this dimension will assist you in choosing frames that suit your desired photos or artwork.

6. Cutlery Tray

A typical cutlery tray, used for organizing silverware in drawers, often measures around 20 centimeters in length. Knowing this length ensures finding the right-sized tray to fit seamlessly into your kitchen drawers, while keeping your cutlery and utensils neatly separated and easily accessible.

7. Hardcover Book

Many hardcover books have a standard length of around 20 centimeters, making them compact and convenient for reading and storage. By understanding the length of a hardcover book, you can estimate shelf space or choose the appropriate bag or cover for protection and transportation.

8. Pencil

A standard wooden pencil typically measures around 17–18 centimeters in length, falling slightly short of 20 centimeters. However, pencils with added erasers or mechanical pencils can reach or exceed the 20-centimeter mark. Keeping this in mind allows for precise measurement and estimation.

9. Ruler (School/Art/Craft)

Besides the standard ruler mentioned earlier, specialized rulers used in schools, art, or crafts can also come in lengths of 20 centimeters. These rulers often have additional markings, such as angles or measurements, specific to their intended purpose.

10. Paper Towel Roll

A roll of paper towels often has a length of around 20 centimeters, making it a versatile and essential item for cleaning or absorbing spills. Being aware of this measurement helps when selecting a paper towel holder or estimating the amount of paper towels needed for a particular task.

Frequently Asked Questions (FAQs)

How long is 20 centimeters in inches?

To convert 20 centimeters to inches, you can use the conversion factor of 1 centimeter equals approximately 0.3937 inches. Multiply the number of centimeters by 0.3937 to obtain the approximate length in inches. Therefore, 20 centimeters would be approximately 7.87 inches.

Can I estimate the length of objects without a ruler or measuring tape?

Estimating the length of objects without a ruler or measuring tape can be challenging, but you can use reference objects or body parts for comparison. For example, if you know the length of your palm or the size of your smartphone, you can compare it to the object you want to measure and estimate its length accordingly.

Are there other common objects that are approximately 20 centimeters long?

Yes, there are many other objects that can have a length of approximately 20 centimeters. Some examples include a small cutting board, a compact tablet, a standard envelope, a paperback book, or a small purse. Exploring different categories of objects helps expand your understanding of the 20-centimeter length.

How accurate are objects listed as “approximately” 20 centimeters long?

Objects listed as “approximately” 20 centimeters long may vary slightly in length. Factors such as manufacturing tolerances or variations in design can cause slight deviations from the exact length of 20 centimeters. However, the objects mentioned in this guide are commonly found items with lengths that closely approximate 20 centimeters.


Understanding the length of 20 centimeters provides practical knowledge for estimating and comprehending the dimensions of everyday objects. From rulers and smartphones to notebooks and picture frames, familiarizing yourself with the lengths of these items allows for better organization, selection of accessories, and accurate estimation.

By knowing the conversion from centimeters to inches and exploring various objects with a length of 20 centimeters, you can expand your understanding of measurements and apply it to different contexts in your daily life.

Remember, while objects listed as “approximately” 20 centimeters may have slight variations, this guide serves as a valuable reference for practical purposes.

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