Dr. Emily Carter
LinkedInDr. Emily Carter Dr. Emily Carter is a renowned expert in lingerie design, with over 20 years in fashion and functional apparel. Her expertise in fabric and fit drives Tarbo’s mission to create comfortable, seamless lingerie that empowers every woman to feel confident and at ease, no matter the occasion.
Sister sizes are groups of bra sizes where the cup volume remains the same despite the band size and cup letter changing. This is the ultimate "hack" for solving common fit frustrations.
● The Golden Rule: If you go UP in the band, you must go DOWN in the cup (and vice versa) to keep the same internal volume.
● Example: A 34C has the same cup volume as a 32D or a 36B.
Bra Cup Too Small Fixes: How to Increase Volume Without Losing Support
If your breast tissue is overflowing (spillage) or the center gore doesn't sit flat, your cup is likely too small.
● The Fix: Increase the cup letter. However, if the band feels perfect, move to your sister size by going down one band size and up two cup letters to find the right depth without losing tension.
● Tarbo Insight: Our Tarbo use flexible polymers that accommodate minor volume fluctuations, but a correct base cup size is essential for optimal Directional Lift.
Bra Band Too Tight Solutions: How to Gain Breathing Room and Comfort
If the bra is digging into your ribcage or leaving red marks, the band is too tight. This is a common issue that restricts Chest Decompression.
● The Fix: Do not just increase the band size. Moving from a 34B to a 36B will make the cup too large.
● The Sister Size Solution: To keep the same cup fit but gain breathing room, move UP one band size and DOWN one cup letter (e.g., from 34B to 36A).
● Ergonomic Tip: Switching to a Wide-Band Seamless Design helps distribute pressure more evenly than traditional thin straps.
Why Tarbo’s Soft-Support Technology Adapts to Your Sister Size
At Tarbo, we’ve engineered our Seamless Collection to bridge the gap between traditional rigid sizing and real human movement.
1. Tensile Elasticity: Our fabrics offer a 360-degree stretch that self-adjusts to your sister-size range.
2. Soft-Support Vectors: Unlike steel wires that poke when the size is slightly off, our jelly supports flex with your ribcage.
3. Anatomical Padding: Designed to fill the cup gaps often found when switching between sister sizes.
Conclusion: Achieve a Zero-Compression Fit Using Expert Sizing Logic
Don't settle for "close enough." By using sister sizing as a tool for Ergonomic Adjustment, you can eliminate pain and maximize support. If your current bra feels like a "steel cage," it’s time to switch to a Tarbo.
