Measure the screen diagonal to find your tablet's official size

Tablet size is measured in inches from one corner of the screen to the opposite corner — the diagonal measurement. A 10-inch tablet has a screen that measures 10 inches diagonally. This is the number you'll see in product names and spec sheets, and it's the standard way manufacturers label tablets.

You can measure this yourself with a ruler or measuring tape, starting from the bottom-left corner of the screen and measuring to the top-right corner. Measure only the screen itself, not the bezel (the frame around it). Most tablets fall between 7 and 13 inches, though some specialty models are smaller or larger.

If you don't want to measure, the easiest way to find your tablet's size is to look at the original packaging, the product manual, or the manufacturer's website. You can also check your device's settings — on most tablets, the screen size appears in the "About Device" or "System Information" section.

Key Takeaways

  • Tablet size is the diagonal measurement of the screen in inches, from corner to corner.
  • You can find the official size in your device settings under "About Device" or "System Information," or on the original packaging and manual.
  • Common tablet sizes range from 7 inches (small, portable) to 13 inches (larger, closer to a laptop screen).
  • If you measure yourself, measure only the screen glass, not the frame or bezel around it.

Where to find your tablet size in settings

On an iPad, go to Settings, then General, then About. Look for "Model Name" — it will say something like "iPad (10th generation)" or "iPad Pro 12.9-inch." The size is usually in the model name itself.

On an Android tablet, open Settings, scroll to About Tablet or About Device, and look for "Model" or "Device Name." Some Android tablets also list the screen size directly in this section. If you don't see it there, search the model number on the manufacturer's website — Samsung, Lenovo, and other makers list full specs including screen size on their product pages.

Common tablet sizes and what they're used for

Small tablets (7 to 8 inches) are lightweight and fit easily in a bag or backpack. They're good for reading, watching videos, and light browsing. Examples include the iPad mini and many budget Android tablets.

Medium tablets (9 to 10 inches) are the most common size. They offer a good balance between screen space and portability. Most iPad Air models and standard iPad models fall into this range, as do many Android tablets from Samsung and other makers.

Large tablets (11 to 13 inches) have screens closer to a laptop size and are better for productivity work, drawing, or detailed reading. iPad Pro models in 11-inch and 12.9-inch sizes are popular here, along with some high-end Android tablets.

Check the original box or documentation

If you still have the box your tablet came in, the screen size is printed on the outside, usually near the top or on the back. The manual or quick-start guide that came with your tablet also lists the screen size in the specifications section.

If you've lost the box and manual, you can still find this information by searching your tablet's model number online. The model number appears in Settings under "About Device" or "About Tablet" — copy it and search it on Google or the manufacturer's website, and the full specifications will appear.

Measure the screen yourself if needed

Place a ruler or measuring tape at the bottom-left corner of your screen (where the glass starts, not the frame). Stretch it diagonally to the top-right corner. Write down the measurement in inches. This number should match the official size listed by the manufacturer, though it may be slightly off due to rounding.

Make sure you're measuring only the screen itself. The bezel — the plastic or metal frame around the screen — doesn't count toward the official size. If your measurement is close to a standard size (like 9.7 or 10.2 inches), you've found your tablet's size.

Why manufacturers measure this way

The diagonal measurement became the standard because it's a single number that describes the overall screen area in a way that's straightforward to compare. Two tablets with the same diagonal measurement will have roughly the same viewing area, even if their width and height are slightly different.

This measurement is also what matters most to users — it tells you how much screen space you have for reading, watching, or working. A 10-inch tablet gives you noticeably more screen than an 8-inch tablet, which is why the size number is so useful when you're deciding whether a tablet will work for your needs.

Frequently Asked Questions

Is the tablet size the same as the screen size?

Yes. When manufacturers say a tablet is 10 inches, they mean the screen is 10 inches diagonally. The overall tablet (including the frame and back) is slightly larger, but the "size" always refers to the screen measurement.

Can I find my tablet size if I don't have the box?

Yes. Go to Settings, find your model number in "About Device" or "About Tablet," and search that model number online. The manufacturer's website will show the full specifications, including screen size. You can also measure the screen yourself with a ruler.

Why is my measurement slightly different from the official size?

Manufacturers round to the nearest half-inch or whole inch. A screen that measures 9.7 inches diagonally is marketed as a 10-inch tablet. Small variations in how you hold the ruler can also cause slight differences. If your measurement is within 0.3 inches of a standard size, that's your tablet's size.

Does the size include the frame around the screen?

No. The official size measures only the screen glass itself, from corner to corner. The bezel or frame around the screen is not included in the measurement. When you measure yourself, measure only the glass area.

Are all 10-inch tablets the same size?

They have the same screen diagonal, but the width and height can vary slightly depending on the screen shape. A tablet with a wider aspect ratio will be wider but shorter than one with a narrower aspect ratio, even if both are 10 inches diagonally.