How to Find Your Size & Measure Properly
📘 How to Find the Size of a Book
When you want to know the exact size of a book, all you need is a ruler or measuring tape and a flat surface. Begin by placing the book in front of you, closed, with the front cover facing up.
Step 1: Measure the Length
First measure across the front cover from the left side to the right side. This is the length of the book — it tells you how long the book is when it’s closed. Keep the ruler flat against the cover for an accurate reading.
Step 2: Measure the Width (Thickness)
Next, stand the book upright and measure from the front cover to the back cover — this is the width, sometimes called the spine thickness. It shows how thick the book is.
Step 3: Measure the Height
Lay your ruler or tape measure along the longest edge of the book — this runs from the top of the book to the bottom. This number is the height. Record the measurement in millimeters.
📏 How to Convert Measurements to Millimeters (mm)
Millimeters are a smaller unit of measurement often used for precise sizing, like in printing, design, or manufacturing. Here's how to convert other common units to millimeters:
🔹 Converting Inches to Millimeters
To convert inches to millimeters, use this formula:
1 inch = 25.4 millimeters
Step-by-Step:
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Take your measurement in inches.
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Multiply it by 25.4.
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The result is the length in millimeters.
Example:
A book that’s 8.5 inches long
8.5 × 25.4 = 215.9 mm
🔹 Converting Centimeters to Millimeters
To convert centimeters to millimeters, it’s even easier:
1 centimeter = 10 millimeters
Step-by-Step:
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Take your measurement in centimeters.
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Multiply it by 10.
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The result is the length in millimeters.
Example:
A book that’s 21.6 cm wide
21.6 × 10 = 216 mm
🧠 Quick Tip
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Always multiply to convert to millimeters.
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For best accuracy, use a calculator if needed.
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Double-check which unit you're starting with (inches or cm) before converting!