How to Convert a USA Size Small Shirt to a European Size

Written by matthew caines
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How to Convert a USA Size Small Shirt to a European Size
A 14.5-inch collared-shirt converts to a European size 37. (measuring tape image by Andrzej Włodarczyk from

If you are ordering clothes from abroad -- or even selling them abroad -- you may need to make a few calculations and check the exact size of what you are buying or selling. There are basic conversion tables that can calculate these sizes for you so that if you want to convert a USA size small shirt, you will know exactly what it would measure in the European market.

Skill level:


  1. 1

    Convert a USA size small T-shirt by labelling it as a European size 87. This is a standard rate of conversion and is the same for every T-shirt marked with a "small" or "S" label. The rate is also not constant, which means that you cannot keep adding the same number for each ascending size. For example, a USA size medium T-shirt converts to a European 91 and a USA size large converts to a European 102.

  2. 2

    Convert a USA size small collared-shirt by multiplying the size by 2 and adding 8. For example, convert a 14.5-inch shirt to a European size by multiplying by 2 (29) and adding 8, which gives you a size value of 37. In the same way, a 15-inch shirt would convert to a European size of 38. This method works for all sizes up until 16 inches, when you must add 9 instead of 8.

  3. 3

    Use a converter if you cannot remember the conversions or formulas off by heart. There are plenty of converters available online that work live; simply click on the "U.S. Letter" drop-down menu, choose a size value and the European conversion will be immediately visible in the same row. Use these conversion tools for other garments and sizes as well.

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