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    Fitbit Air band sizes

    Smartwatch line1 references

    Band systems by model

    Fitbit Air: the band size or band system of each model, with 1 references listed.

    Indicative information. Check your watch before buying a strap: whatsmylugwidth.com is not responsible for an incorrect size. Report an error

    1 Fitbit Air references

    FAQ

    Which bands fit the Fitbit Air?

    It depends on the generation and case size. .

    Can I use a regular watch strap on the Fitbit Air?

    The pebble snaps into a sleeve in the band, using a tension-based snap-in mechanism, and Google lists its accessory bands as only compatible with Fitbit Air.

    Which band size do I need?

    The woven Performance Loop and the Elevated Modern Band are one size for 130 to 210 mm wrists. The silicone Active Band comes in Small (130 to 175 mm) and Large (165 to 210 mm).

    Are there third-party bands, including bicep bands?

    At launch only Google's own straps existed. In June 2026 Google published CAD drawings and design rules for makers, and by late August many bicep bands for the Air were sold online. DC Rainmaker expected bicep wear to improve heart rate accuracy.

    Can I buy the Stephen Curry band on its own?

    Not at the time of Tom's Guide's June 2026 test: the Curry loop came only with the $129.99 Special Edition tracker.

    The story of the Fitbit Air

    Fitbit Air is a 5.2 gram sensor pebble with no screen, so the band you snap it into is the whole look. Stephen Curry wore one for months before anyone noticed it.

    5.2 gweight of the pebble alone, 12 g with a band
    35 mmHgminimum sensor contact pressure Google recommends to third-party band designers
    130 to 210 mmwrist range of the one-size Performance Loop
    5 minutesof charging for about one day of use

    Chapters

    1. August to September 2026
      A Pikachu band for sleep

      For Pokemon's 30th anniversary Google added a Pokemon Sleep Special Edition: the same tracker on a Sleepy Blue Performance Loop with a Sleeping Pikachu label. It cost $129.99, was sold in the US and Japan only, and started shipping on 15 September.

    2. June 2026
      Blueprints for anyone's band

      Less than a month after launch, Google published 2D CAD drawings of the pebble and its sleeve, with mating tolerances and attach and detach forces, so independent makers could build bands. At launch only first-party straps existed; by late August 9to5Google counted many bicep bands for the Air online.

    3. May 2026
      A pebble with swappable bands

      Google announced the Fitbit Air on 7 May 2026 at $99.99, with shelves following on 26 May. The pebble pops out of its band, and three band families launched with it: the Performance Loop that ships in the box, the silicone Active Band and the Elevated Modern Band.

    4. January to April 2026
      Hidden on an NBA wrist

      Hidden on an NBA wrist: Stephen Curry had been wearing the unreleased tracker since January, and nobody spotted it for months.

    Worn by

    Stephen CurrySport2026

    The NBA star wore the unreleased screenless Fitbit band from January 2026, in photos and videos no one noticed for months.

    Moments

    Android Authority, citing Droid-Life, reported in April 2026 that Stephen Curry had worn the unreleased tracker since January, giving clear sightings across Instagram, YouTube and Getty Images.

    On 2 June 2026 Google released 2D CAD drawings of the pebble and sleeve, with attach and detach forces, for band makers.

    DC Rainmaker reported the hook-and-loop band stayed secure through open water swims, mountain biking and repeated eFoil falls at 30 km/h.

    Generations and strap changes

    1. 2026
      Fitbit Air (Performance Loop)

      The launch tracker is a 34.9 x 17 x 8.3 mm pebble with optical heart rate, red and infrared SpO2 sensing and a skin temperature sensor, but no GPS. It is water resistant to 50 meters and rated for 7 days of battery.

      Ships on the woven Performance Loop, one size for 130 to 210 mm wrists, closed with hook and loop. The pebble snaps into the band's sleeve and pops out by pushing on it.

    2. 2026
      Active Band

      A sweatproof silicone accessory band at $34.99 in Obsidian, Lavender, Berry and Fog.

      Two sizes: Small for 130 to 175 mm wrists, Large for 165 to 210 mm, with a pin-and-buckle closure. Google lists it as only compatible with Fitbit Air.

    3. 2026
      Elevated Modern Band

      The dressiest option at $49.99, in Moonstone, Obsidian and Porcelain, each paired with its own clasp finish.

      Polyurethane band with a stainless steel buckle, one size for 130 to 210 mm wrists.

    4. 2026
      Pokemon Sleep Special Edition

      The first follow-up to the Air keeps the same hardware and pairs a Sleepy Blue Performance Loop with a silk print label of Sleeping Pikachu, priced at $129.99.

      A special Performance Loop band on the unchanged tracker.

    About Fitbit

    Founded in 2007 in San Francisco, California, United States.

    Ambassadors include Andrew Wiggins, Will Smith The Fitbit story

    Help

    What is lug width?

    The gap between the two lugs that hold the strap, in millimetres. A new strap must match it exactly: 20 mm lugs take a 20 mm strap.

    Measure it in 30 seconds

    1. Take the strap off, or look at the back of it: many straps print their width.
    2. Measure the inside gap between the lugs with a caliper or a millimetre ruler.
    3. Round to the nearest whole millimetre. Most watches use 18, 20 or 22 mm.

    Strap, quick release or system?

    Most watches use spring bars, so any strap of the right width fits. Many smartwatches use their own band system instead, such as Apple Watch bands or Garmin QuickFit.