How to choose a size for someone else

Sep 20, 2026

Short answer: Look inside a garment the person already owns and use the size from there. If that is not possible, choose something where size matters as little as possible, such as socks or loose tops.

A label in an existing garment is the answer

The easiest route is to check the label at the neck or in the side seam of something the person wears often. Note both brand and size, because sizes vary between brands. Do the same with long sleeve styles, where sleeve length matters. A quick photo of the label is easy to take along.

Choose something with a wide range

Socks and loose tops have wide size ranges and therefore fit far more often than close fitting items. A sock usually covers several shoe sizes, and a loose top can handle a size up or down. So choose bamboo socks over something that must fit precisely if you are unsure of the measurements.

Avoid close fitting items

Base layers such as bamboo underwear for women need to fit precisely to work, which makes them the hardest to guess. One size too small feels tight, one size too large sits loose and loses its purpose. If you still want to give underwear, find out the exact size first.

Measure a garment quietly

If you have access to the person's wardrobe, borrow a garment that fits well and measure it. Lay it flat and measure the width under the arms and the length. Then compare with the garment measurements in the size guide. It is more accurate than guessing from appearance, and it keeps the gift a surprise.

When you are between two sizes

If you are torn between two sizes, pick the larger one for loose items. A top that is a little roomy gets worn, while one that feels tight often stays in the drawer. With close fitting items it is harder, and a different kind of gift may be better. Think about how the person usually likes their clothes to fit.

Ask someone who knows

A partner, sibling or close friend often knows what size the person wears. It is a small question that can save a return. You can also ask the person in a natural way, for example when you are talking about clothes. Most people are happy to be asked, and the result is far more reliable.

Think about colour and style too

Size matters most, but colour and style also decide whether the gift gets worn. Look at what the person already wears day to day. Neutral colours are often the safest choice. Pick something that fits with what they have rather than something you like that does not match their style.

Make exchanges easy

However well you prepare, the size can still be wrong. Include a gift receipt, or mention that it can be exchanged. Then the person feels free to get the right size without any awkwardness. It makes the gift more useful and shows that you thought it through.