Calculator Form
Example Data Table
| Snug Underbust | Average Bust | Cup Difference | Estimated UK Size | Sister Sizes |
|---|---|---|---|---|
| 31 in | 38.8 in | 6.8 in | 32F | 30FF, 34E |
| 33 in | 41.2 in | 7.2 in | 34F | 32FF, 36E |
| 35 in | 43.1 in | 7.1 in | 36F | 34FF, 38E |
Formula Used
Modern band estimate: round the selected underbust base to the nearest even band.
Traditional band estimate: add four inches to an even underbust, or five inches to an odd underbust.
Average bust: standing bust plus leaning bust plus lying bust, divided by three.
Cup difference: average bust minus selected band.
Cup label: the rounded cup difference maps to UK cup letters. Panache sizing commonly uses UK cup labels.
Sister size rule: one band down usually means one cup letter up. One band up usually means one cup letter down.
How to Use This Calculator
- Choose inches or centimeters.
- Enter snug and tight underbust measurements.
- Enter standing, leaning, and lying bust measurements.
- Select fit preference, projection, spacing, and style goal.
- Press the calculate button.
- Review the UK result first for Panache sizing.
- Check sister sizes when the band feels close but imperfect.
- Use CSV or PDF export to save the result.
Advanced Panache Bra Size Guide
Panache bras usually follow United Kingdom cup lettering. That detail matters because double cup letters can change the final label. This calculator starts with body measurements. It then estimates a supportive band and a likely cup. It also shows sister sizes, since nearby bands can hold similar cup volume.
Why Measurements Matter
A bra is a small engineered support system. The band works like a tension ring around the rib cage. It carries most breast weight. The cups shape volume and reduce movement. Straps guide the cup position, but they should not do all the lifting. Accurate underbust and bust numbers create better force balance.
Physics Behind Support
Support depends on circumference, stretch, pressure, and distributed load. A firm band spreads tension across a wider area. That lowers strain at the shoulders. A cup with enough depth lets tissue sit inside the wire line. A shallow cup can push tissue outward. A loose band can rotate upward and reduce lift.
Using the Estimate
Enter snug and tight underbust values. Then enter standing, leaning, and lying bust values. The average bust helps describe volume from different body positions. Choose a comfort setting. Firm settings favor stable support. Relaxed settings add ease for sensitive ribs. The final result should guide fitting, not replace trying bras.
Interpreting Sister Sizes
Sister sizes share related cup volume. When the band goes down, the cup letter usually goes up. When the band goes up, the cup letter usually goes down. This helps when one size feels close. For Panache styles, many users prefer a secure band. Still, comfort must come first.
Fit Notes
Check the center gore, wire position, cup edge, and band line. The gore should sit close when the style allows it. The wire should surround tissue without resting on it. The band should stay level during movement. If the cup wrinkles, consider less volume. If tissue spills, consider more volume or more projection.
Result Limits
Every brand grades patterns differently. Fabric stretch also changes fit. Two bras with the same label can feel different. Use the result as a starting point. Recheck measurements after weight change, pregnancy, surgery, or major training changes. Body posture can also affect numbers.
FAQs
Is this calculator made for Panache sizing?
Yes. It focuses on UK cup lettering, which is commonly used for Panache bras. The result is still an estimate, because fabric, style, wire shape, and personal comfort affect final fit.
Which result should I trust first?
Use the UK size first for Panache styles. The US and EU results are approximate conversions. Try the main result and sister sizes when possible.
Why are there three bust measurements?
Standing, leaning, and lying measurements capture tissue position from different angles. Averaging them gives a better volume estimate than one bust measurement alone.
What does sister size mean?
A sister size keeps related cup volume while changing the band. Going down one band usually needs one cup letter up. Going up one band usually needs one cup letter down.
Should the band feel tight?
The band should feel secure, not painful. It should stay level and support most weight. If breathing feels restricted, try a relaxed band choice or a sister size.
Why does projection matter?
Projection describes how breast tissue extends forward. A projected shape may need deeper cups. A shallow shape may need less cup depth for a smooth edge.
Can this replace a fitting?
No. It gives a measured starting point. A real fitting can identify wire width, gore height, strap placement, fabric stretch, and cup shape more precisely.
When should I remeasure?
Remeasure after weight change, pregnancy, surgery, training changes, or comfort changes. Measurements can shift over time, even when clothing size appears stable.