This article walks you through 11 real things that are 1.375 inches long so you can visualize this exact size instantly, no ruler required. Whether you’re a DIYer, a student, or simply curious, these familiar 1.375-inch examples are the most practical size references you’ll ever use.

Kitchen Items That Measure 1.375 Inches

Your kitchen holds one of the most universally recognized things that are 1.375 inches long — and you touch it almost every single day without realizing its exact size.

Standard Plastic Bottle Cap Diameter

The standard plastic bottle cap used on soda and water bottles in the USA measures exactly 1.375 inches in diameter. This regulated size ensures full compatibility with high-speed automated bottling machinery used by manufacturers like Coca-Cola and PepsiCo across their U.S. production facilities.

The 1.375-inch bottle cap diameter is one of the most accessible real-world references because it sits in nearly every American kitchen and grocery bag.

Office Items That Are 1.375 Inches Long

Your desk drawer is quietly stocked with some of the most reliable 1.375-inch objects in existence — two of which you probably use every single week.

Medium Binder Clip Width

The medium binder clip, manufactured by brands like Staples and Officemate, measures exactly 1.375 inches across its metal wire frame width. This standardized dimension is maintained across production batches to ensure consistent grip strength and proper compatibility with standard U.S. letter-size paper stacks.

The medium binder clip’s 1.375-inch frame makes it one of the most dependable office references for this measurement.

Jumbo Paper Clip Length

The jumbo paper clip, widely stocked by brands like ACCO in office supply stores across the USA, measures approximately 1.375 inches along its longest outer edge. This oversized clip is engineered to hold thicker document stacks without bending, and its length makes it a natural reference for objects that measure 1.375 inches.

The ACCO jumbo paper clip is found in classrooms, law offices, and home workspaces nationwide, making it one of the most accessible 1.375-inch items for students and professionals alike.

Personal Items That Measure 1.375 Inches

Some of the most portable and always-available things that are 1.375 inches long are items you already carry in your pocket or wallet every day.

Stack of Six U.S. Quarters

When you stack exactly six U.S. quarters on top of each other, the total combined height reaches 1.375 inches. According to the U.S. Mint, each standard quarter measures 0.069 inches in thickness, so six quarters stacked vertically create a precise and practical 1.375-inch measurement tool.

This six-quarter stack method works perfectly as a no-tool reference in workshops, craft rooms, or anywhere a ruler isn’t handy.

Standard House Key Width

The standard house key, measured from the top of the bow (the round handle section) down to the bottom blade edge, sits at approximately 1.375 inches in width. Major U.S. key blank manufacturers maintain this consistent bow-to-blade dimension across residential key profiles for ergonomic grip and reliable lock cylinder operation.

The standard house key is arguably the most portable 1.375-inch object in America because most people carry one daily on their keychain.

Technology Items That Are 1.375 Inches

Precision engineering makes technology products some of the most dimensionally consistent 1.375-inch examples you’ll find anywhere in the modern world.

USB-A Connector Length

The USB-A connector, including its full metal housing and surrounding plastic casing, measures approximately 1.375 inches in total length from tip to base. This dimension is governed by the USB Implementers Forum (USB-IF) standard, which is why USB-A connectors from every manufacturer — from Anker to Belkin — share this same universal measurement.

The USB-A connector’s 1.375-inch length is directly responsible for the plug-and-play compatibility that billions of devices worldwide rely on.

USB Thumb Drive Width

The USB thumb drive, including its full plastic casing body width, measures approximately 1.375 inches across. Manufacturers like SanDisk engineer this compact casing width to fit standard pockets and laptop bags while still providing adequate internal space for flash memory components and the USB connector interface.

The SanDisk USB thumb drive sitting in your desk drawer or laptop bag is a real-world 1.375-inch object that millions of Americans handle weekly.

Hardware & Tools Items That Measure 1.375 Inches

The hardware world operates on tight dimensional standards, and 1.375 inches is one of the most frequently stocked fastener lengths in U.S. home improvement stores.

1.375-Inch Machine Screw Length

The 1.375-inch machine screw — also labeled as the 1 3/8-inch machine screw — is a construction-grade fastener stocked as standard inventory at Home Depot and Lowe’s locations across the USA. These precision-threaded screws are used in furniture assembly, home appliance installation, and light machinery fastening where a medium-length grip is required.

The 1 3/8-inch machine screw provides enough thread engagement to hold components securely without excessive protrusion on the opposite side, which is why builders and DIYers select this size consistently.

Sports & Outdoor Items That Are 1.375 Inches Long

From the golf course to the recreation room, 1.375 inches is a performance-critical, officially regulated dimension in American sports equipment.

Castle-Style Golf Tee Height

The castle-style golf tee — also called a step-down tee or low-profile tee — stands exactly 1.375 inches tall and is specifically engineered for lower ball positioning when hitting fairway woods and long irons. This tee height is a popular choice among U.S. golfers playing par-3 holes and tight approach shots that demand a controlled, penetrating ball flight.

The 1.375-inch castle golf tee height allows golfers to develop a consistent, repeatable setup that directly improves shot accuracy on the course.

Vintage 38mm Ping Pong Ball Diameter

The original regulation table tennis ball, used globally before the International Table Tennis Federation (ITTF) updated its standard in 2000, measured exactly 38mm in diameter — which equals 1.375 inches. This vintage 38mm ping pong ball size was the official global standard for decades and remains widely used in recreational and garage settings across the USA.

The original 38mm ping pong ball is one of the most recognizable 1.375-inch objects in American recreational sports history, and most people who grew up playing basement or garage table tennis handled this exact size their entire lives.

Games & Recreation Items That Measure 1.375 Inches

Competitive gaming demands the strictest dimensional precision, and 1.375 inches is a tightly regulated specification in some of the most carefully manufactured game equipment in the USA.

Professional Casino Precision Die

The professional casino precision die — used on regulated table games in Las Vegas and Atlantic City — measures exactly 1.375 inches on each face side, per gaming commission standards enforced in Nevada and New Jersey. These precision casino dice are held to a manufacturing tolerance of just 0.0005 inches per side, making them among the most dimensionally accurate 1.375-inch objects produced anywhere.

The 1.375-inch casino precision die is noticeably larger than the standard 0.625-inch board game dice found in home game boxes, which is why the size difference is immediately obvious when you hold both.

Conclusion

From the standard plastic bottle cap in your refrigerator to the precision casino die on a Las Vegas table, things that are 1.375 inches long surround you in every area of daily American life. Next time you need a quick size reference for 1.375 inches, skip the ruler — your house key, a bottle cap, or six stacked U.S. quarters give you an instant, always-available answer.

FAQ’s

What is 1.375 inches in fraction form?

1.375 inches equals exactly 1 3/8 inches — a standard fractional size used widely across U.S. construction, woodworking, and hardware fastener specifications.

How many centimeters is 1.375 inches?

1.375 inches converts to exactly 3.4925 centimeters (or 34.925 mm), which is the metric equivalent used in international technical and engineering specifications.

What is the easiest household item that is exactly 1.375 inches?

A standard plastic bottle cap and a medium binder clip are the two easiest things that are 1.375 inches to find instantly in any American home or office.

How do I measure 1.375 inches without a ruler?

Stack six U.S. quarters vertically or grab a standard bottle cap — both deliver a reliable, tool-free 1.375-inch reference you can use anywhere.

Is 1.375 inches bigger than a U.S. quarter?

Yes — a U.S. quarter measures only 0.955 inches in diameter, but stacking six quarters vertically reaches exactly 1.375 inches in total combined height.

Where does 1.375 inches appear in construction?

1.375 inches is a common fastener length for machine screws, and also appears in drill bit diameters, pipe fittings, and hardware component specs used across U.S. residential construction.

What is the difference between 1.375 inches and 1.5 inches?

The difference is exactly 0.125 inches (1/8 inch), which equals approximately 3.175 millimeters — a critical gap in precision woodworking, metalworking, and hardware fitting applications.

Can I use my body to estimate 1.375 inches?

Yes — the width of an adult thumb at the knuckle approximates 1.375 inches closely enough for quick informal estimates when no measuring tool is available.