This precise length — equal to 1 3/8 inches — hides in your desk drawer, kitchen cabinet, pocket, and gaming table all at once. Here are 7 real everyday objects that measure exactly 1.375 inches long, so you always have a handy reference nearby.
Quick Conversion Guide — 1.375 Inches
| Unit | Value |
|---|---|
| Inches (Decimal) | 1.375 in |
| Fraction | 1⅜ inches |
| Millimeters | 34.925 mm |
| Centimeters | 3.49 cm |
| Meters | 0.034925 m |
| Feet | 0.1146 ft |
7 Things That Are 1.375 Inches Long — Quick Reference List
| # | Object | Category |
|---|---|---|
| 1 | Standard #1 Regular Paperclip | Office Supplies |
| 2 | Plastic Bottle Cap (Soda / Water) | Kitchen & Household |
| 3 | Medium Binder Clip | Office Supplies |
| 4 | Standard House Key Shaft | Household Items |
| 5 | USB Thumb Drive (Width) | Technology |
| 6 | Professional Casino Precision Dice | Games & Recreation |
| 7 | Stack of 6 U.S. Quarters (Height) | Currency Reference |
Office Items That Are 1.375 Inches
Your office desk is one of the richest spots to find things that measure 1.375 inches long. Two of the most common items sitting right in front of you hit this exact dimension with remarkable consistency.
Standard #1 Regular Paperclip
A standard #1 regular paperclip — the kind sold by Acco and Staples in bulk boxes — measures exactly 1.375 inches in total length from end to end.
Academic measurement resources including Homework Study have confirmed this dimension, making the #1 paperclip one of the most widely cited 1.375-inch reference objects in everyday life.
Medium Binder Clip
A medium binder clip — measured across its metal wire frame width — lands exactly at 1.375 inches, confirmed through consistent manufacturing standards followed by brands like Staples and Officemate.
This tight tolerance is a deliberate production requirement, not a coincidence, ensuring the clip fits standard document thicknesses reliably.
Kitchen and Household Items Measuring 1.375 Inches
Your kitchen holds more precise measurements than you might expect, and the 1.375-inch dimension shows up right on your countertop and in your recycling bin every single week.
Plastic Bottle Cap
A standard plastic bottle cap — the twist-off type found on carbonated soda bottles and water bottles from brands like Coca-Cola and PepsiCo — measures approximately 1.375 inches (34.925 mm) in diameter.
This dimension is a deliberate manufacturing standard engineered to work seamlessly with high-speed automated bottling machinery across major production facilities.
Personal Items That Measure 1.375 Inches
Some of the most reliable things that are 1.375 inches long are objects you carry on your person every single day. These two personal items give you an instant measuring reference wherever you go.
Standard House Key Shaft
The shaft of a standard residential house key — measured from the bow (the handle portion you grip) down to the blade tip — runs approximately 1.375 inches in length.
This dimension has been a consistent industry standard for residential key blanks used across the United States for decades, maintained by locksmith supply manufacturers and key-cutting services alike.
Stack of 6 U.S. Quarters
Stacking six U.S. quarters directly on top of each other produces a combined height of approximately 1.375 inches (34.925 mm).
Each U.S. quarter has a federally standardized thickness of 1.75 mm, confirmed by the U.S. Mint, meaning six stacked quarters consistently and predictably reach the 1.375-inch mark.
Technology Items Around 1.375 Inches
Compact tech accessories are engineered to precise dimensions, and the 1.375-inch measurement appears in one of the most commonly owned portable storage devices in the United States.
USB Thumb Drive Width
A standard USB thumb drive — measured across the widest point of its plastic casing body — comes in at approximately 1.375 inches in width.
Manufacturers design these portable flash storage devices to this compact dimension so they fit comfortably in pockets and laptop bags while still leaving enough internal space for circuit boards and storage chips.
Gaming and Hobby Items That Are 1.375 Inches Long
Precision matters most in competitive play, and one iconic gaming item is manufactured to the 1.375-inch dimension with tolerances tighter than almost any other everyday object on this list.
Professional Casino Precision Dice
Professional casino precision dice — also called perfect dice or casino-grade dice — measure exactly 1.375 inches (34.925 mm) on each side.
Gaming commissions in Nevada and New Jersey regulate this exact dimension, and manufacturers hold each die to a tolerance of 0.0005 inches per side, making casino dice among the most precisely manufactured 1.375-inch objects in existence.
Conclusion
From the #1 paperclip on your desk to a precision casino die on a Las Vegas table, 1.375 inches appears in more places than most people ever realize.
The next time you need a quick reference for things that are 1 3/8 inches, reach into your desk drawer, pocket, or kitchen cabinet — your measuring tool is already there. Explore more everyday measurement guides to keep building your real-world size reference library.
Frequently Asked Questions
What common object is exactly 1.375 inches long?
A standard #1 regular paperclip measures exactly 1.375 inches in total length, confirmed by academic measurement sources, making it one of the most reliable everyday references for this size.
How long is 1.375 inches in millimeters?
1.375 inches converts to exactly 34.925 millimeters, or approximately 3.49 centimeters — a precise metric equivalent used in engineering and manufacturing specifications.
What fraction is 1.375 inches on a ruler?
1.375 inches is the decimal form of 1 and 3/8 inches, a fractional measurement clearly marked on standard U.S. tape measures between the 1-inch and 1.5-inch marks.
Is a plastic bottle cap really 1.375 inches?
Yes — standard plastic soda and water bottle caps measure approximately 1.375 inches in diameter, a size standardized across the beverage industry to fit automated bottling machinery reliably.
What household item can I use to measure 1.375 inches without a ruler?
A medium binder clip frame width or a plastic bottle cap diameter both consistently measure 1.375 inches, making either a practical no-ruler reference tool for home projects.
How does 1.375 inches compare to my finger width?
1.375 inches equals roughly two and three-quarter thumb widths for the average adult hand, giving you an instant body-based reference for this 1 3/8 inch measurement anytime.
Why is 1.375 inches a common measurement in hardware and manufacturing?
1.375 inches equals 1 3/8 inches — a standard fractional dimension used in wood screws, machine screws, and hardware components because it balances grip depth with compact sizing for both residential and commercial applications.
My name is Shehzad Ali. I am the admin and author of cansdimension.com. I write simple guides about can sizes and dimensions. I share information to help readers understand cans.
