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Armband Size Guide

Upper arm circumference

How to Measure

  1. 1Wrap a flexible tape measure around your upper arm
  2. 2Measure at the fullest part (mid-bicep)
  3. 3Note in inches or centimeters

Size chart

Size Inches cm
Standard Armband 8.5″ – 15.5″ 21.5 – 39 cm
Extra-Long Armband 12.5″ – 18.5″ 31.5 – 47 cm
Both armbands fit most body types.
Additional bra extenders can be purchased at any store if larger sizing is required.

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Does it matter what time I wake up or how long I sleep?

By Tempdrop team

We are happy to inform you that your days of alarm-clock wake-ups to take your temperature are over. With Tempdrop, your temperature is monitored continuously throughout the night. This means that whenever you wake up, your sleeping temperature will be waiting to sync to your app. 

The same applies if you experience disturbed sleep or a shift worker. You will still be able to retrieve a result to chart your cycles. Here are the headlines...

  • Tempdrop must be turned on and worn for a minimum of three hours
  • Two hours of sleep must be detected for a valid result. Sleep time does not have to be consecutive 

As best practice, turn on and wear you Tempdrop just before going to sleep and remove it as soon as you are up for the day. If your sleep is disturbed for a period of time during the night, leave the sensor on. 

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