Fitbit Size Guide – Must Read Before You Choose

Fitbit Size Guide – When purchasing a Fitbit, size is a vital aspect you will need to factor in before making a final decision. The main reason why Fitbit devices sell so well is their relatively easy-to-use design, offering accurate data and incorporating a reliable software ecosystem.

One size fits all is one of the biggest lies in the world of fashion; therefore, you would want to look for a product that will best suit your needs.

With the correct Fitbit size, you will be able to enhance comfort. But, how do you choose the perfect Fitbit size? To find the answer to this question, consider reading this article to the end as we take you through the Fitbit size guide.

Related Fitbit Posts to Read Later

What is Fitbit’s Size Chart?

Size matters; thus, before making any purchase, you will need to decide on a size that will best suit your needs. Since Fitbit is something you will be having with you almost 24-hours a day, it is vital to look for the correct size that will be comfortable when worn.

You will only receive accurate data from your Fitbit when you put it on correctly.

When it comes to Fitbit, there are two standard sizes to choose from; large and small. Furthermore, there is a special size you might consider ordering via the original Fitbit website, and that is the extra-large. If you were on the lookout for a regular or medium size Fitbit you are out of luck.

Below is the size chart of Fitbit;

Band Size

Wrist Size

(in Inches)

Wrist Size

(in mm)


5.5 inches to 6.7 inches

140 mm to 170 mm


6.7 inches to 8.1 inches

170 mm to 206 mm

Extra Large

8.1 inches to 9.3 inches

206 mm to 236 mm

Therefore, when purchasing a Fitbit, ensure that the product is within your wrist size for a perfect fit. You can always refer to the above table for further assistance.

However, Fitbit offers a sizing tool to measure your wrist size. So let’s see how to use the official Fitbit sizing tool.

How to Use Fitbit Sizing Tool?

In case you do not know your wrist size and would like to choose the perfect Fitbit size, all you require is a pair of scissors and a printer.

The company offers an effective Fitbit sizing tool. Download & print this Fitbit size, and then measure your wrist using it. With this, you will be able to find the correct Fitbit size that will best fit your wrist.

But, Not everyone has a printer, so there is no need to worry. If you don’t own a printer, you can just measure your wrist size in an old-fashioned manner.

How To Accurately Measure Your Wrist Size For A Fitbit?

Video Guide on How to Measure your Wrist

To do so, take a measuring tape or a tape measure and use it to measure your wrist’s circumference. Another alternative method is using a rope and wrap it on your wrist and then measure it on a ruler. Once you find your wrist size, you can measure it against the Fitbit’s size shown in the table above.

Fitbit size guide how to measure wrist size
Measuring Wrist Size Using Rope

In case you come up with two different measurements, it is advisable to purchase a Fitbit size that is the biggest in your measurement. And size Fitbits are adjustable; you can easily tighten it up to best suit your wrist accordingly.

Why Measuring Your Wrist Before Purchasing A Fitbit Is Vital?

As stated earlier, Fitbit comes in two standard sizes and a third size which can be ordered directly from the company. And since Fitbit breaks down their devices in different wrist sizes, you will need to figure out your wrist size before making any final decision.

Therefore, by measuring your wrist, purchasing a Fitbit within your wrist size becomes relatively easy. With the right size in place, wearing a Fitbit throughout the day will not feel uncomfortable, and you will be able to receive accurate data every time

How To Wear A Fitbit?

Once you have found the correct wrist size, the next thing you would want to consider is how to wear a Fitbit correctly.

First and foremost, you should avoid tightening your Fitbit once you strap it on. When your Fitbit is immobile on your hand, it starts getting uncomfortable to put on, and it increases the risk of developing a rash as time progresses.

However, you should wear your Fitbit tight enough while leaving some room for it to move easily up and down on your wrist. At the same time, it should not be too loose that it starts distracting as your move your hand.

Furthermore, if you own a Fitbit equipped with a heart monitor, you should wear it a bit higher up the wrist. To be precise, you should wear it approximately two-finger length from your wrist’s base. Here, the heart rate tracker will be able to get accurate readings.


With the correct Fitbit size, you will be able to benefit from it significantly. For any wrist device, it is essential to ensure that it is not too tight and a Fitbit is not different. In fact, a perfect size Fitbit is ideal for improving your overall comfort and preventing the development of rashes.

It makes it easy to correct accurate data every single time. Therefore, to benefit significantly from a Fitbit, you will need to look for the perfect size.

With that said, we hope that you have found this article beneficial.

Manas Swain
Manas Swain

Hey! My name is Manas. I am a tech enthusiast who loves to explore gadgets. I especially enjoy exploring wearable techs like smartwatches and fitness trackers. I am always in search of what's new in the market so that I can provide valuable content that would be beneficial for you to choose the right wearable. I own Kospet Tank M1, which is pretty insane in its price range :)

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