SKU: 001479122

Twist-O-Flex™ Band for the Fitbit Charge 3 & Charge 4


Effortless Style Meets Sport

Back in 1959, the original Twist-O-Flex™ revolutionized watch band design. Continuing to flourish in the industry, we are proud to say that this style is available to compliment your beloved Fitbit. Our watch bands effortlessly combine style with sport, taking your Fitbit to a whole new level of fashion and comfort.

Reviews How to Change Size Guide ↗

Twist-O-Flex™ Band for the Fitbit Charge 3 & Charge 4

Size Guide

Fitbit Charge 3 Band Sizes

Band Size Wrist Size (in inches) Wrist Size (in mm's)
XS 5.6" – 5.8" 143 – 147 mm
S 6.2" – 6.4" 158 – 162 mm
M 6.8" – 7.0"

172 – 176 mm

7.6" – 7.8"

193 – 197 mm

8.8" – 9.0"
223 – 227 mm

View our Band Length Sizing Guide

If you are on the line between sizes, we recommend choosing the larger size as you can remove links with the use of our link removal guide. You can also visit a local authorized Speidel jeweler and have it sized for you.

If you need a size that is larger than our current offerings, additional links can be added. Visit for additional link kits.

  • Compatibility:
    This Twist-O-Flex™ band is compatible with your Fitbit Charge 3 and Charge 4.
  • Materials:
    The stainless steel construction of this band boasts impressive strength and water resistance. It’s the perfect companion to make your Fitbit work for you outside the gym.
  • Easy on, easy off:
    There’s no need to struggle with a clasp or buckle when you choose the Twist-O-Flex™ band. It features a large expansion range of up to 5” inches, allowing you to easily put on and take off as needed.
  • Choose your finish:
    Style available in silver and black.

  • Free ShippingFree US Shipping on Orders $99+
  • Ltd WarrantyOne Year Limited Warranty
  • Free ReturnsFree 30 Day Return Policy
  •   Built for the long haul
    With its stainless steel construction, the Twist-O-Flex™ band is built to carry you day in and day out.   
  • Fit for all
    The Twist-O-Flex™ large expansion range is sure to provide the perfect fit with its simple, adjustable band length and easy on, easy off construction. 
  • Created for comfort
    Our patented Twist-O-Flex™ design was built to maximize comfort while creating a sleek, easy-to-wear design.
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Customer Reviews

Based on 43 reviews
Cheryl Slaby

The band was a gift and he loved it!!
Great quality, ordering was easy, and delivery was fast.

Austin Palacios
Strong, Sleek, Durable, Classy

I've been a watch guy for a long time. Now the FitBit Charge 3 fills the roll with fit and function. I was apprehensive about a flex band because I had been burned in the past. After doing my research I chose the Speidel and was more than happy with the performance. I have fairly hairy arms and it does not tug at my hair or pinch my skin. It seems the band is aging at the same pace as the FitBit so the band looks like it is in it for the long run. I am jazzed about my purchase.

Lois Mossa
2nd band

I love the new band I purchased for my new Fitbit.


Steven Will
Speidel twist-o-flex band for Fitbit Charge 4.

This band is great. Easy to put on and no more catching on clothing.

Margo Blakeslee
This is the best band for a Fitbit made

I appreciate the ease of taking it off and on, and the comfort of this band. I do not like the rubber bands that come with the watch and when they got wet it felt awful.
I take my fitbit off every night so I love this! It looks so good and not like a kid's watch. I bought one of these bands made for his apple watch and he won't use any other band. My fitbit charger is so easy to use the band does not interfere at all. The apple watch we bought an elevated charger and it is no problem either. THE BEST BAND OUT THERE!

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