20 inches equals one foot and eight inches, or about 50.8 centimeters.
It is also close to the height of a standard carry-on suitcase without the handle extended.
In this article, we’ve rounded up 14 common things that are 20 inches long — from bedroom staples and kitchen tools to baby products and sports gear.
Picture this length without a tape measure, these real-world comparisons make 20 inches instantly easy to visualize.
| Unit | Equivalent |
|---|---|
| Inches | 20 inches |
| Centimeters (cm) | 50.8 cm |
| Millimeters (mm) | 508 mm |
| Feet (ft) | 1.667 ft |
| Meters (m) | 0.508 m |
| Kilometers (km) | 0.000508 km |
| Yards (yd) | 0.556 yd |
| Miles (mi) | 0.000316 mi |
💪 Forearm Length (Elbow to Fingertip)
- Most adults measure 18–21 inches from elbow to fingertip.
- Adult males average 19–21 inches; females average 17–19 inches.
- Start at the elbow bone and measure to the tip of the middle finger.
- One full forearm extension gets very close to 20 inches.
✋ Three Hand Spans
- An average hand span measures 6.7–7.5 inches.
- Three spans equal roughly 20–22 inches.
- Start at your pinky tip and stretch to your thumb tip.
- Repeat three full spans side by side to estimate 20 inches.
🦾 Shoulder to Elbow
- The upper arm measures approximately 18–22 inches.
- This naturally falls within the 20-inch range.
- Start at the shoulder joint and measure down to the elbow.
- Quick and useful for furniture or storage sizing.
Quick Reference: Objects Close to 20 Inches
| Object | Approx. Length (in inches) | Closeness to 20 Inches | Best Situation |
|---|---|---|---|
| Standard Bed Pillow | 20–20 in | 10 / 10 | Bedroom visual reference |
| Large Decorative Throw Pillow (20×20) | 20–20 in | 10 / 10 | Sofa or décor comparison |
| Large Picture Frame (16×20) | 20–20.5 in | 9 / 10 | Wall height reference |
| Kitchen Cutting Board | 19.5–20 in | 10 / 10 | Countertop measurement |
| French Rolling Pin | 18–20 in | 9 / 10 | Baking tool comparison |
| Four Standard Soda Cans Lined Up | 19.2–19.4 in | 9 / 10 | Quick kitchen estimate |
| Carry-On Luggage (20-inch Suitcase) | 20–21 in | 10 / 10 | Travel size reference |
| Back Scratcher | 18–20 in | 8 / 10 | Personal reach estimate |
| 20-Inch Computer Monitor | 19.8–20 in (diagonal) | 10 / 10 | Desk setup comparison |
| Small Flatscreen TV (20-inch) | 19.8–20 in (diagonal) | 10 / 10 | Compact room reference |
| Laptop Bag (Standard Size) | 19–20 in | 9 / 10 | Work or school carry |
| Two Standard Basketballs Side by Side | 18.8–19 in | 8 / 10 | Sports visual comparison |
| Painting Canvas (20×20 inches) | 20–20 in | 10 / 10 | Art and décor sizing |
| Average Newborn Baby Length | 18–22 in | 9 / 10 | Human size perspective |
Objects Around World (20) Inches Long
| Country | Traditional Item | Approx. Length | Measurement Context |
|---|---|---|---|
| 🇺🇸 United States | 🪶 Plains War Bonnet (Feather Headdress) | ≈ 19–20 inches | Measured from the front forehead band to the end of the longest trailing feather. Traditional Plains war bonnets often extend close to 20 inches, making them a culturally significant Native American ceremonial item and a strong visual reference for this length. |
| 🇬🇧 United Kingdom | 🛡️ Medieval Knight’s Dagger | ≈ 18–20 inches | Measured from pommel to blade tip. Many late medieval daggers carried alongside swords measured close to 20 inches overall, representing Britain’s historic chivalric era. |
| 🇯🇵 Japan | ⚔️ Wakizashi (Samurai Short Sword) | ≈ 19–21 inches | Measured from the tsuba (guard) to the blade tip. Traditional wakizashi swords commonly feature blade lengths around 20 inches, symbolizing the samurai class and Edo-period heritage. |
| 🇮🇳 India | 🪵 Dandiya Raas Stick | ≈ 18–20 inches | Measured from one decorated end to the other. Traditional wooden dandiya sticks used during Navratri celebrations often approach 20 inches, making them culturally meaningful festive dance instruments. |
| 🇫🇷 France | 🥖 Traditional Baguette | ≈ 19–21 inches | Measured from crust tip to crust tip. A classic French baguette frequently measures close to 20 inches, serving as one of France’s most iconic culinary symbols and an easy everyday comparison for this length. |
| 🇨🇦 Canada | ❄️ Traditional Indigenous Snowshoe | ≈ 19–21 inches | Measured from the curved toe to the tail end. Smaller traditional Indigenous snowshoes often measure near 20 inches in length, reflecting Canada’s winter travel heritage and offering a clear cultural visualization. |
Bedroom and Home Items That Are 20 Inches Long
Some of the most familiar 20-inch objects are right in your own bedroom and living room — items you touch, move, and use without ever thinking about their dimensions.
Standard Bed Pillow
A standard American bed pillow measures exactly 20 inches × 26 inches, and that shorter 20-inch side is the width you rest your head against every single night.
Just grab your pillow and hold it by the short end. That measurement in your hands is exactly 20 inches long — no ruler, no guesswork.
More Posts:14 Common Things That Are 9 Inches Long/Length
Large Decorative Throw Pillow (20×20 Inches)
Oversized square throw pillows sold at Target, Walmart, and IKEA in the US commonly come in a 20×20-inch square format, meaning all four sides measure exactly 20 inches.
Unlike a rectangular bed pillow, this square version gives you four separate 20-inch edges to reference from any angle.
More Posts:10 Common Things That Are 102 Inches Long/Length
Large Picture Frame (16×20 Print Size)
The 16×20-inch print is the most popular large portrait size sold at US photo labs, craft stores. The frame that holds this print stands 20 inches tall.
That family photo on your hallway wall — if it’s a 16×20 — has a frame reaching exactly 20 inches from top to bottom.
Kitchen Items That Are 20 Inches Long
Your kitchen is quietly packed with things that measure 20 inches — from prep surfaces to baking tools sitting right in your drawers and countertops.
Kitchen Cutting Board
A standard large kitchen cutting board in the US typically measures 20 inches × 14 inches, with that longer horizontal edge sitting right at the 20-inch mark.
Pull your cutting board out of the cabinet and lay a measuring tape along its longer side — there’s a strong chance you’re looking at almost exactly 20 inches of length.
French Rolling Pin
A classic French rolling pin — the tapered, handle-free style favored by pastry chefs — measures between 18 and 20 inches in length, with most standard models landing right at 20 inches.
That precise, clean 20-inch length is no accident — it’s designed to match the natural sweep of an adult arm across a baking surface.
Four Standard Soda Cans Lined Up
A standard 12-ounce aluminum beverage can — the kind sold at every gas station and grocery store across the US — stands exactly 4.83 inches tall. Line up four of them end to end and their combined length reaches 19.32 inches, landing just under the 20-inch mark.
This is one of the most accessible and fun comparisons because the cans are uniform in size no matter the brand.
Travel and Personal Items That Are 20 Inches Long
From airport carry-ons to everyday personal accessories, several travel and personal items are deliberately designed around the 20-inch standard.
Carry-On Luggage (20-Inch Suitcase)
A 20-inch carry-on suitcase measures exactly 20 inches tall — not counting wheels and handle — and is one of the most commercially standardized 20-inch objects in existence.
Every time you lift one into an overhead bin, you’re handling a real-world 20-inch length firsthand.
Back Scratcher
Most standard back scratchers sold across the US measure between 18 and 20 inches in total length — and that design is completely intentional.
A back scratcher measuring 20 inches long isn’t a random dimension — it reflects the average adult torso reach requirement.
Technology Items That Are 20 Inches Long
The tech world is full of 20-inch length examples — screens, bags, and accessories are all quietly built around this dimension in ways most people never notice.
20-Inch Computer Monitor
A 20-inch computer monitor is measured diagonally from the bottom-left corner to the top-right corner of the screen. Its actual width is approximately 17.4 inches and height around 10.4 inches, but that diagonal measurement equals exactly 20 inches.
If you’re sitting at a 20-inch monitor right now, you’re working in front of a real-life example of what 20 inches looks like.
Small Flatscreen TV (20-Inch)
A 20-inch flatscreen TV, measured diagonally across the screen. Its screen width measures approximately 17.4 inches, and the overall unit width including the bezel sits closer to 18 to 19 inches.
For anyone who owns one, the screen itself is a tangible, wall-mounted reference for exactly how long 20 inches is in real life.
Laptop Bag (Standard Size)
A standard laptop bag designed to carry a 15 to 17-inch laptop typically measures 19 to 20 inches wide — that extra width beyond the laptop itself accommodates chargers, notebooks, and accessories.
The bag slung over your shoulder right now might already be one of the most common things that are 20 inches long that you’ve never thought to measure.
Sports and Hobby Items That Are 20 Inches Long
Sports gear and creative hobby supplies offer some of the most memorable and interesting 20-inch object comparisons — especially for athletes, artists, and craft enthusiasts.
Two Standard Basketballs Placed Side by Side
An official NBA regulation basketball has a diameter of approximately 9.39 to 9.51 inches according to league specifications. Place two of them side by side and their combined width spans approximately 18.8 to 19 inches — just a whisker under the 20-inch mark.
Next time you watch a game, mentally picture two balls touching side by side — that’s your near-perfect 20-inch visual ruler.
Painting Canvas (20×20 Inches)
A 20×20-inch square painting canvas is one of the bestselling canvas sizes.Every single edge of this canvas measures exactly 20 inches, making it a perfect four-sided reference for this measurement.
If you’ve ever hung a square canvas in your home, each side of that frame was giving you a precise 20-inch length reference the entire time.
Human and Baby References That Are 20 Inches Long
One of the most meaningful and emotionally resonant things that are 20 inches long is something that touches millions of American families every single year.
Average Newborn Baby Length
According to the CDC and the American Academy of Pediatrics, most full-term newborns in the United States measure between 18 and 22 inches at birth, with 20 inches being the most commonly recorded average birth length.
That tiny, swaddled baby in the hospital blanket — measuring 20 inches long — puts every other comparison in this article in a completely different light.
Conclusion
From the width of your bedroom pillow to the length of a newborn baby, things that are 20 inches long appear in almost every corner of everyday American life in ways most people never stop to notice.
Now that you have 14 clear, real-world comparisons — from kitchen cutting boards to NBA basketballs — you’ll never struggle to visualize how long 20 inches really is again. Whether you’re shopping, decorating, or measuring without a ruler, these familiar objects turn an abstract number into something you can instantly see and feel.
FAQ‘s
How long is 20 inches exactly?
20 inches equals exactly 50.8 centimeters, 508 millimeters, or 1 foot and 8 inches — a mid-sized measurement that appears in hundreds of everyday objects across the United States.
What household item is 20 inches long?
A standard bed pillow measures exactly 20 inches wide, making it the most common and immediately recognizable 20-inch object found in almost every American home.
Is 20 inches big or small?
20 inches falls right in the mid-range — larger than a standard sheet of paper at 11 inches but noticeably smaller than a typical baseball bat, which runs 28 to 36 inches.
How can I measure 20 inches without a ruler?
Line up four standard soda cans end to end for approximately 19.3 inches, or extend your forearm from elbow to fingertip — which measures roughly 18 to 21 inches for most American adults.
What is 20 inches in feet and inches?
20 inches converts to exactly 1 foot and 8 inches — divide 20 by 12 to get 1 full foot, with 8 inches remaining as a straightforward calculation.
Is 20 inches the average newborn baby length?
Yes — the CDC confirms that most full-term US newborns measure between 18 and 22 inches at birth, with 20 inches being the most frequently recorded average birth length.
How many centimeters is 20 inches?
20 inches equals exactly 50.8 centimeters, calculated by multiplying 20 by the standard conversion factor of 2.54 centimeters per inch.
Hi, I’m Ava Addams, the author at HowIsLong.com. I help simplify measurements with easy-to-use tools and clear explanations—so you can convert units quickly and accurately.Explore our guides to understand lengths, distances, and everyday measurements with confidence.
