The right size in men's underwear

Short answer: Underwear size is decided by waist measurement, not trouser size. Measure around the waist where the waistband should sit, and compare it with the product size guide. If you fall between two sizes, think about whether you prefer a close or a loose fit.

Measure your waist instead of guessing

Trouser size does not always say how underwear will fit, because brands measure differently. Take a soft tape measure and measure around your waist at the place where the waistband should lie. Write the figure down in centimetres and use it every time you look for a new size.

How to read the size guide

The size guide shows which waist measurement each size covers, and some also show hip measurements. Find the column that matches your figure and look at the nearest sizes. Read the fit notes too, for example whether the style is close-fitting or loose, because that changes which size feels right.

Bamboo boxer briefs and size

Bamboo in clothing is viscose from bamboo. The fabric gives a little, but it does not replace the right size. Look at bamboo boxer briefs and compare your measurement with the guide for the specific model. If you are unsure, compare with a pair that fits you well today.

Signs they are too small

If the underwear is too small, the waistband leaves deep marks, the legs ride up and the fabric pulls. You may also feel it squeeze when you sit. That is a sign to go up a size. Remember that the fabric does not always give with time, so do not wait for it to get better.

Signs they are too big

If they are too big, the waistband slips and the fabric folds, especially under your trousers. The legs can hang and roll, which can cause chafing. Then you should try a smaller size. If they sit closely enough to stay in place without squeezing, the size is probably right.

Between two sizes

If your measurement is right on the border, think about what you prefer. If you want a close fit, the smaller may be best, and if you want it loose, the larger may suit. Try both if you can, and choose the one that is more comfortable when you walk and sit.

Brands and cuts vary

Sizes can vary between brands and between models. What fits in one cut does not have to fit in another. That is why it pays to check the guide every time, even if you have bought the same size before. Write down your preferred size for each model.

Washing and the rest of the wardrobe

Wash the underwear according to the care label so it keeps its shape and the size keeps fitting. Think about size in the rest of your clothes too. Look at bamboo underwear for men and bamboo T-shirts for men, and use the same approach to measure and compare.

Frequently asked questions

Should I choose by trouser size

No, trouser size is a poor starting point because brands measure differently. Measure your waist and compare it with the size guide for the specific model.

What do I do if I am between two sizes

Think about whether you prefer a close or a loose fit. Try both if you can, and choose the one that is more comfortable when you walk and sit.

Can underwear get bigger over time

The fabric can give a little, and the waistband can lose some of its tension, especially after many washes. Follow the care label and switch to a new pair when the waistband no longer holds.