Understanding measurements can sometimes feel confusing, especially when you only see numbers written online. Many people search for measurements like 20 centimeters because they want to picture the actual size before buying products, decorating rooms, completing school projects, or comparing objects how big is 20 cm.
If you have ever wondered how big 20 cm really is, you are not alone. Numbers alone are hard to imagine until they are compared with real-world objects that you already know.
So, how big is 20 cm?
Twenty centimeters equals approximately 7.87 inches, which is just slightly smaller than 8 inches. It is considered a medium-sized measurement commonly found in everyday household items, electronics, kitchen tools, stationery, and decorative products.
In this complete guide, you will learn how long 20 cm looks compared to familiar objects, how to estimate it without a ruler, how it compares with inches, and why this measurement appears so often in daily life.
By the end of this article, you will be able to visualize 20 cm instantly without needing any measuring tape.
How Long Is 20 CM in Different Units?
Before comparing it with real-life objects, it helps to understand the measurement in different units.
| Unit | Equivalent |
| Millimeters | 200 mm |
| Inches | 7.87 inches |
| Feet | 0.656 feet |
| Meters | 0.2 meters |
Since many countries use inches instead of centimeters, people often understand measurements faster when converted into inches.
You can think of 20 cm as:
- Almost 8 inches
- About two-thirds of a standard ruler
- Slightly longer than most smartphones
- Roughly the size of common kitchen utensils
These comparisons help create a quick mental image.
Is 20 CM Big or Small?
Twenty centimeters is considered a medium-sized measurement.
It is not extremely small like 2 or 5 centimeters, but it is also not large enough to be considered oversized. It fits comfortably between small handheld objects and larger household items.
For example:
- Bigger than a credit card
- Larger than most phones
- Smaller than a laptop
- Shorter than a full ruler
This balanced size makes 20 cm extremely common in product design and manufacturing.
Many objects are intentionally designed around this measurement because it is easy to hold, carry, and store.
How Big Is 20 CM Compared to Everyday Objects?
The easiest way to understand measurements is by comparing them with objects you see daily. Below are several real-life examples that are close to 20 centimeters long.
A Standard School Ruler
One of the easiest ways to picture 20 cm is by using a school ruler.
Most rulers are 30 cm long. If you imagine removing the last 10 cm section, the remaining part equals 20 cm.
This means 20 cm is:
- Two-thirds of a ruler
- Long enough to cover most notebook widths
- A noticeable handheld size
Students and teachers often use this comparison because rulers are familiar measurement tools worldwide.
A Large Banana
A medium-to-large banana is usually very close to 20 cm in length.
This comparison works surprisingly well because bananas are easy to visualize. When you hold a large banana in your hand, you are holding something very close to the actual size of 20 centimeters.
That makes fruit one of the most relatable measurement references.
A Dinner Fork or Spoon
Most dinner utensils measure between 18 and 20 cm.
This means a regular dinner spoon or fork is almost identical to the size of 20 cm.
Kitchen utensils are excellent references because nearly everyone uses them daily. Once you recognize their size, visualizing 20 cm becomes much easier.
A Hairbrush
Many standard hairbrushes measure around 20 centimeters from handle to tip.
This makes hairbrushes another perfect example of this length.
Since these objects are used almost every day, your brain naturally becomes better at estimating measurements after noticing these comparisons.
Two Stacked Smartphones
Most smartphones today are around 15 centimeters tall.
If you place two phones slightly diagonally or add a few finger widths, the total length becomes close to 20 cm.
This comparison is useful because phones are among the most familiar modern objects.
A TV Remote
Many television remotes range between 18 and 22 centimeters long.
That means your remote control is likely very close to the size of 20 cm already.
This example helps because remote controls are found in almost every home.
A Paperback Book Width
Some paperback books measure approximately 20 cm in height or width.
Books are excellent for visualizing measurements because their shapes are easy to recognize mentally.
If you hold a small book in your hand, you are often holding something very close to 20 cm.
A Water Bottle
Certain reusable water bottles are about 20 centimeters tall.
Compact bottles designed for travel or school bags frequently use this measurement because it balances portability and storage capacity.
How Big Is 20 CM in Inches?
Twenty centimeters equals approximately 7.87 inches.
For simplicity, most people round this to:
- Nearly 8 inches
- Slightly less than 8 inches
This conversion is especially useful for people living in countries that use inches instead of centimeters.
If you already know what 8 inches looks like, then you can easily picture 20 cm.
Why People Struggle to Visualize Centimeters
Many people find centimeters harder to imagine compared to inches or feet because centimeters are relatively small units.
For example:
- 1 cm looks tiny
- 5 cm still feels small
- But 20 cm becomes much more noticeable
Without comparisons, your brain may underestimate the total length.
That is why visual references are so important.
Once you connect 20 cm with familiar objects like rulers, bananas, or utensils, the size becomes easy to remember forever.
Common Things That Are Around 20 CM Long
Here are more real-world objects close to this measurement:
| Object | ApproximateSize |
| Kitchen knife | 20 cm |
| Hairbrush | 20 cm |
| TV remote | 18–22 cm |
| Small tablet | Around 20 cm |
| Compact umbrella handle | 20 cm |
| Toy figure | Around 20 cm |
| Decorative candle | 20 cm |
| Pencil pouch | Around 20 cm |
These examples help train your eyes to estimate the size naturally.
How to Measure 20 CM Without a Ruler
You do not always need a ruler to estimate measurements. Several everyday tricks can help you judge 20 cm quickly.
Use Your Hand
An average adult hand from wrist to fingertip measures around 18–20 cm.
This makes your own hand one of the easiest measuring tools available anytime.
Use a Smartphone
Most smartphones are about 15 cm long.
Add two or three finger widths and you will be very close to 20 cm.
Use Paper
A standard A4 paper sheet measures 29.7 cm long.
Visually estimating two-thirds of the sheet gives you roughly 20 cm.
Use Currency Notes
Many paper currency notes are around 15–16 cm long.
Adding a small extra section creates a close estimate for 20 cm.
These methods are useful for:
- Quick DIY projects
- Shopping measurements
- Estimating package sizes
- Craft work
- Interior decorating
What Products Commonly Use 20 CM Measurements?
Twenty centimeters is extremely common in manufacturing because it creates a balanced medium size.
Products around this size include:
- Kitchen tools
- Electronic accessories
- Storage containers
- Makeup kits
- Pencil boxes
- Decorative items
- Portable gadgets
- Small handbags
Manufacturers prefer this measurement because it is easy to hold, transport, and package.
20 CM Compared to Human Body Parts
Body-based comparisons help visualize measurements quickly.
Here are a few examples:
- Adult hand length = nearly 20 cm
- Child shoulder width = around 20 cm
- Some shoe lengths = near 20 cm
- Forearm sections = close to 20 cm
These natural references are useful when no measuring tools are nearby.
20 CM vs 10 CM
Many people underestimate how large 20 cm actually is because they mentally compare it with 10 cm.
Here is the difference:
- 10 cm = about 4 inches
- 20 cm = about 8 inches
This means 20 cm is exactly double the size of 10 cm.
When you place them side by side, the difference becomes very obvious.
20 CM vs 30 CM
A full ruler is usually 30 cm long.
Compared to that:
- 20 cm is shorter
- It covers two-thirds of the ruler
- It still feels fairly long in your hand
This comparison is helpful for students and office workers who regularly use rulers.
Is 20 CM Good for Portable Items?
Yes, absolutely.
Twenty centimeters is considered an excellent size for portable products because it is:
- Easy to carry
- Comfortable to hold
- Large enough to be useful
- Small enough to fit in bags
That is why many everyday items use dimensions close to 20 cm.
Fun Facts About 20 CM
Here are some interesting facts about this measurement:
- 20 cm is nearly 8 inches long.
- Many kitchen utensils are designed around this length.
- Some tablets use dimensions close to 20 cm.
- It is one of the most practical medium-sized measurements.
- School supplies often use 20 cm dimensions.
- Many storage boxes use 20 cm widths for convenience.
Why Understanding Measurements Matters
Knowing how big 20 cm looks can help in many daily situations.
For example:
- Buying products online
- Understanding package dimensions
- Planning room layouts
- Choosing furniture
- Selecting bags
- Working on crafts
- Measuring school projects
Without visual understanding, measurements can feel meaningless.
But once you connect them to real-life objects, estimating becomes simple.
Easy Ways to Remember 20 CM
If you want to remember this size instantly, think about:
- A large banana
- A TV remote
- A dinner spoon
- Two-thirds of a ruler
- Nearly 8 inches
These mental images help your brain estimate measurements quickly.
FAQs
Is 20 CM equal to 8 inches?
Not exactly, but it is very close.
Twenty centimeters equals approximately 7.87 inches.
Is 20 CM considered long?
It is considered medium-sized. It is longer than many handheld items but shorter than large household objects.
What objects are exactly 20 CM long?
Examples include:
- Some hairbrushes
- Kitchen utensils
- Compact remotes
- Pencil pouches
- Decorative candles
Can I estimate 20 CM without a ruler?
Yes. You can use:
- Your hand
- A smartphone
- A banana
- A dinner spoon
- Part of an A4 paper
Is 20 CM bigger than a phone?
Yes, most smartphones are slightly shorter than 20 cm.
See Also: How Big Is 18 CM
Conclusion
Understanding how big 20 cm is becomes much easier when you connect the number with everyday objects. Instead of trying to imagine centimeters alone, think about familiar items like a large banana, a dinner fork, a TV remote, or two-thirds of a school ruler.
Twenty centimeters is one of the most practical and commonly used measurements in daily life. It appears in electronics, household products, kitchen tools, school supplies, and decorative items because it offers the perfect balance between compact and useful size.
Once you start recognizing these comparisons, you will no longer need a ruler every time you see this measurement. The next time someone asks, “how big is 20 cm,” you will instantly have several clear visual examples ready in your mind.