Nursing Bra Size Calculator
Find your perfect nursing bra size during pregnancy and breastfeeding. Enter your measurements below for an accurate size recommendation.
List of the Top 10 Best Nursing Bra:
How to Measure for a Nursing Bra?
Before You Start
- Measure without a padded bra
- Use a soft measuring tape
- Stand straight in front of a mirror
- Take measurements at the same time of day
- For nursing mothers, measure before feeding when breasts are fullest
When to Measure During Pregnancy and Nursing?
| Stage | When to Measure | Size Adjustment |
|---|---|---|
| First Trimester | Around week 12 | Current size + 1 cup |
| Second Trimester | Around week 20 | First trimester size + 1 cup |
| Third Trimester | Around week 36 | Second trimester size + 1-2 cups |
| Nursing | 4-6 weeks postpartum | Purchase based on current measurements |
Special Considerations for Nursing Bras
Band Size
- Choose a band that fits on the tightest hook during pregnancy
- This allows you to tighten the band as your rib cage shrinks postpartum
- Band should be firm but comfortable
Cup Size
- Allow for slight fullness at the top of the cup
- Cups should fully contain breast tissue without spillage
- Consider stretchy cup materials for fluctuating sizes
Signs of a Good Nursing Bra Fit
- Easy one-handed nursing clasp operation
- No wire pressure on breast tissue
- Comfortable support during feeding
- Adequate coverage for nursing pads
- Smooth transition when cups are lowered
Nursing Bra Size Chart
Use this chart as a general guide for size changes during pregnancy and nursing:
| Stage | Expected Change | Recommended Bra Type |
|---|---|---|
| First Trimester | +1 cup size | Stretchy wireless bra |
| Second Trimester | +1-2 cup sizes | Supportive wireless bra |
| Third Trimester | +2-3 cup sizes | Nursing bra with extra hooks |
| First Month Nursing | +1-2 cup sizes from third trimester | Sleep nursing bra |
| Established Nursing | -1 cup size from first month | Structured nursing bra |
Frequently Asked Questions About Nursing Bras
How many nursing bras do I need?
We recommend having 3-4 nursing bras: 2-3 for daily wear and 1-2 sleep nursing bras. This allows for regular washing and accounts for size fluctuations.
When should I buy my nursing bras?
Purchase your first nursing bras around 36 weeks of pregnancy. Your rib cage will expand until then, and this timing allows for the best fit when nursing begins.
How should a nursing bra fit?
A nursing bra should be snug but not tight, with cups that fully contain breast tissue and easy-to-use nursing clasps. The band should fit on the loosest hook during late pregnancy.
Can I wear an underwire nursing bra?
While wireless bras are often recommended, properly fitted underwire nursing bras are safe. Ensure the wire doesn't press on breast tissue and consider waiting until your milk supply stabilizes (usually 6-8 weeks postpartum).
How often should I remeasure during pregnancy and nursing?
Measure every trimester during pregnancy and at 4-6 weeks postpartum. After that, remeasure any time you notice changes in fit or every 3-4 months while nursing.