Size guide: choosing the right compression garment for gynecomastia

The number one cause of disappointment with a compression garment is not the model, it is the size. Too big, it doesn’t compress and creases. Too small, it becomes torture after an hour and ends up at the back of a drawer. Five minutes with a tape measure will save you from both.

Why your usual size isn’t enough

A compression garment is designed to be worn tighter than ordinary clothing. Manufacturers allow for this in their charts, each in their own way. One brand’s “L” may be another’s “M”. And your usual T-shirt size includes room that compression deliberately removes.

The only reliable method: your measurements, compared with the brand’s chart.

The three measurements to take

1. Chest. Wrap the tape measure around your chest at nipple height, arms by your sides. The tape should lie flat and level across your back, without pulling tight. Breathe out normally before reading the measurement.
2. Waist. At navel level, stomach relaxed: don’t pull it in, or the garment will be too small around the stomach and ride up.
3. Torso length. From the top of your shoulder, at the collar, down to your waistband. This tells you whether the model is long enough not to ride up.

Reading a size chart

Most manufacturers give a chart by chest measurement, sometimes by waist, rarely by weight. Here is how to use it:

1. Find your chest measurement in the chart: it is the main one.
2. Check your waist: if it falls into the size above, go for that one, or the garment will roll at the stomach.
3. Compare the garment’s length (when given) with your torso length.

The chart below only gives rough guidance, to help you get your bearings:

Between two sizes: which one?

• Go smaller if you are fairly slim, have a flat stomach, want maximum compression and are already used to this kind of garment.
• Go larger if it is your first compression garment, if you carry weight around the middle, will wear it for long periods or in hot weather, or have breathing difficulties.

When in doubt, larger is safer: a slightly less tight garment you actually wear beats a perfect one you can’t stand.

The right fit: a checklist

Once the garment is on, it should tick all these boxes:

• ✅ you can breathe in fully without discomfort;
• ✅ the chest is flattened and the reinforced panel sits squarely in front;
• ✅ no creases or rolls on the torso;
• ✅ the hem stays below the waistband when you raise your arms;
• ✅ the armholes don’t dig into your armpits;
• ✅ after an hour, no numbness, no pain.

Signs of the wrong size

Practical questions

How many should I buy? At least two, so you can alternate and let the elastane “recover” between wears and washes.

After weight loss? Re-measure every two or three months. A garment that has become too big no longer compresses.

After surgery? The post-operative garment follows its own rules. The size is often chosen by the surgical team, sometimes made to measure. Follow their instructions.

Now you know which size to get. All that is left is to choose the model: our compression shirt comparison and our guide zip-up vest, tank top or T-shirt.

Your questions