The right binder size is the single biggest thing you can do for comfort and safety. A binder that is too small can restrict breathing and cause pain. One that is too big will not flatten anything. Here is how to measure, read a size chart and choose well.
⚡ Quick Answer
- Measure around the fullest part of your chest, level and snug, over a thin shirt.
- Match the number to the maker's size chart.
- Between sizes? Choose the larger one.
Want it done for you? Use our free binder size calculator.
📏 How to Measure Your Chest
- Use a soft tape measure. If you only have a ruler, use a piece of string and measure it afterwards.
- Stand relaxed and wear a thin shirt or nothing.
- Wrap the tape around the fullest part of your chest.
- Keep the tape level and snug, but not tight.
- Breathe out normally, then note the number. Measure twice.
📊 Binder Size Chart
This is a general guide. Brands differ, so always check the maker's own chart.
| Size | Chest (cm) | Chest (inches) |
|---|---|---|
| XS | 74–81 | 29–32 |
| S | 81–89 | 32–35 |
| M | 89–97 | 35–38 |
| L | 97–107 | 38–42 |
| XL | 107–117 | 42–46 |
| 2XL | 117–127 | 46–50 |
| 3XL | 127–137 | 50–54 |
⚖️ Between Sizes? Go Up
Sizing down for a flatter look is the most common mistake, and the one that causes the most harm. Too-tight binders can cause pain, breathing trouble and bruised ribs.
- ✅ If you are on the edge between two sizes, pick the larger one.
- ✅ You should be able to breathe deeply without pain.
- ✅ Never use bandages or duct tape as a substitute.
✅ How a Binder Should Feel
- ✅ Firm and even, with no sharp pain.
- ✅ No pinching under the arms.
- ✅ No rolling or riding up when you move.
- ❌ Stop and take it off if you feel dizzy, short of breath or numb.
Do not wear a binder for more than about 8 hours, and never sleep or exercise in one.
❓ Frequently Asked Questions
How do I measure for a chest binder?
Should I size down for a flatter chest?
Do I need to know my bra size?
How long can I wear a binder?
Ready to pick a size? Try the chest binder size calculator, or read our full chest binder guide.
Disclaimer: This guide is for educational purposes and is not medical advice. Speak to a healthcare professional about binding and your health. © 2026 TransNote.me
