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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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Fertility Awareness & Wellness Support | Tempdrop

​
AllTempdrop Device BlogsFertility AwarenessInfertility
More

Featured

How to Successfully Track Your Postpartum Fertility While Breastfeeding

If you are breastfeeding, your body is performing a silent, hormonal balancing act. While nursing is often touted as 'nature's birth control,' the reality is much more nuanced.

Abigail Rodenburgh

Abigail Rodenburgh

March 31, 2026

a woman breastfeeding her baby in the nursery

Top articles

a woman standing in a kitchen preparing a meal

Hormonal Conditions

August 13, 2026

Food & PMOS (PCOS): What to Avoid and What to Enjoy Guilt-Free

A peaceful desk scene with a journal, hot drink, and soft sunlight, illustrating tracking ovulation and cycle recovery after pregnancy loss.

Trying to Conceive

September 4, 2026

Tracking Ovulation After Pregnancy Loss: What To Expect

Woman near a sunlit window with a warm mug and fertility journal, exploring luteal phase support and progesterone timing for TTC.

Trying to Conceive

August 17, 2026

When to Start (And Stop) Progesterone: A Simple Guide for Women Trying to Conceive


Editor’s picks

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Trying to Conceive

March 30, 2026

Worry Less: See Real Pregnant vs. Not Pregnant Basal Body Temperature Charts

A woman resting during her luteal phase

Hormonal Conditions

June 5, 2026

What is PMS? Everything You Need to Know About Premenstrual Syndrome

a pregnant woman holding an ultrasound contrasted with and a clock

Trying to Conceive

April 26, 2026

When is the best age to get pregnant? (The answer might surprise you)


Tempdrop Device Blogs

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Tempdrop Device Blogs

June 19, 2026

Tempdrop vs. Femometer: Crucial Differences You Need to Know in 2026

Using ChatGPT to search for information about your fertility monitor

Tempdrop Device Blogs

June 19, 2026

How Tempdrop & AI Can Help You Track Your Fertility Better

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Tempdrop Device Blogs

June 16, 2026

5 Proven Fertility Trackers to Welcome Your 2026 Baby


Fertility Awareness

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Fertility Awareness

June 8, 2026

How to Calculate Your Fertile Window: 4 Signs of Ovulation

A woman holding a toothbrush in her hand.

Fertility Awareness

May 1, 2026

Ovulation Test 101: How to Read & Interpret Each Type

A woman tracking ovulation with Tempdrop app

Fertility Awareness

March 11, 2026

Basal Body Temperature (BBT) 101: Mastering the Temperature Method for Health & Family Planning


Infertility

View all
a calendar with a red marker on it

Infertility

May 1, 2026

Possible Reasons for Insufficient Ovulation or Anovulation

Kelly Taylor

Infertility

April 1, 2026

Introducing Kelly Taylor - My Infertility Journey

a doctor is holding a pencil in front of a model of the stomach

Infertility

July 7, 2025

Is Tracking BBT Beneficial After Having a Hysterectomy?


Pregnancy

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Pregnancy

May 25, 2026

TTC After a Miscarriage: Here's What You Should Know + Expert Tips

ttc pregnancy at christmas

Pregnancy

January 5, 2026

Gift Guide for Expectant Mothers: Thoughtful Gifts to Make Pregnancy a Little Easier

a pregnant woman in a white bikini posing for a picture

Pregnancy

October 21, 2025

Morning Sickness Relief: What Works (& What Doesn’t)


Postpartum

View all
a woman sitting on a couch playing with a baby

Postpartum

October 3, 2026

Prolactin: What You Need to Know About the "Milk Hormone"

Chloe Skerlak holding her breastfeeding baby, while wearing Tempdrop

Postpartum

July 1, 2026

Crucial Lessons for Easy Postpartum Ovulation Tracking (My Real Story)

A mother with her newborn son, in the hospital

Postpartum

June 19, 2026

The Golden Month & Tempdrop: Postpartum Support + Hormone Recovery


Hormonal Health

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Tempdrop sensor, tempdrop chart and journal with details about TSH testing

Hormonal Health

June 19, 2026

Hashimoto’s Disease Guide: 5 Secrets to Better Period Health

a woman is writing on a notepad in front of a laptop

Hormonal Health

May 1, 2026

Progesterone Explained: What It Is, What It Does, & Why It’s Vital for Your Cycle

a graphic of the utensils of a female utensil

Hormonal Health

April 14, 2026

What's Considered 'Normal' Parameters for Progesterone?


Menopause

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Menopause

May 1, 2026

My Story: Learning to Embrace Life and Changes in Menopause

A woman sitting in a bathroom, holding a tampon.

Menopause

August 6, 2025

Does Your Menstrual Cycle Change with Age? We Asked Our Experts

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Menopause

July 7, 2025

What to Expect With Your Cycle Through Perimenopause


Mental Health

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Mental Health

March 29, 2026

Mental Health Tips to Support Your Cycle and Thrive in 2026

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Mental Health

March 11, 2026

Can Ovulation Make You Feel Depressed & Emotional? Experts Discuss

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Mental Health

August 12, 2025

Sunlight & Ovulation, What's The Link?


Trying to Conceive

View all
A peaceful desk scene with a journal, hot drink, and soft sunlight, illustrating tracking ovulation and cycle recovery after pregnancy loss.

Trying to Conceive

September 4, 2026

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Woman near a sunlit window with a warm mug and fertility journal, exploring luteal phase support and progesterone timing for TTC.

Trying to Conceive

August 17, 2026

When to Start (And Stop) Progesterone: A Simple Guide for Women Trying to Conceive

a pregnant woman holding a pink flower next to a pregnant woman

Trying to Conceive

May 1, 2026

How Charting Multiple Fertility Awareness Indicators Can Increase Your Chances to Conceive


Hormonal Conditions

View all
A diagram showing the loction in the uterus of fibroids versus the location of ovarian cysts.

Hormonal Conditions

October 2, 2026

Ovarian Cyst vs Fibroid: The Ultimate Guide to Your Fertility

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Hormonal Conditions

September 13, 2026

The 4 Types of PMOS: What They Are —& Why It’s More Complex Than You Think

a calendar with a marker and a pen on it

Hormonal Conditions

September 13, 2026

How to Know If You’ve Ovulated with PMOS (formerly PCOS)


Content by category

Tempdrop Device BlogsFertility AwarenessInfertilityPregnancyPostpartumHormonal HealthMenopauseMental HealthTrying to ConceiveHormonal Conditions

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Science-backed wearable BBT tracking for women who want real fertility insights.

Science-backed wearable BBT tracking for women who want real fertility insights.


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