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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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How is Tempdrop different from other basal thermometers?

By Tempdrop team

How is Tempdrop different from other basal thermometers?

As opposed to taking a manual waking temp, Tempdrop offers continuous monitoring, filtering out waking times to give you a true nightly sleeping temperature. Our smart algorithm learns your unique nightly and monthly patterns to filter variables that can otherwise skew temp results. Worn high up in the inside of the upper arm, the sensor captures an axillary reading making it more accurate than surface skin temperature. 

The accompanying charting app encourages tracking multiple fertility signs to better guide you in understanding your cycle and fertile window. If you already have a favorite charting app, you can freely use it with your Tempdrop data. The choice is yours!

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