Nike clothes & shoes sizing - the same as Adidas or Under Armour ?

Does Nike use the same clothing sizes as Adidas or Under Armour ? When I buy Nike clothes or shoes will the size be the same as in case of Adidas or Under Armour ?

No, Nike is not using the same sizing as Adidas or Under Armour. To see the differences, you can check the size charts for clothes and shoes on their websites. Some items may have similar sizes, but for example, the difference between shoes can be often called essential or "big".

When checking the sizes, please note there are usually different sizes for US, EU, UK etc. You can also check the sizes in Inches or Centimeters. This may be more reliable when comparing the clothes or shoes.

From my experience, Nike has larger size M for t-shirts and jackets, than other brands I prefer. Because of that, when I buy some Nike items, I choose size S instead of M.

There definitely are differences between Nike sizes, Adidas sizes and Under Armour sizes. Some sizes are similar or a little different, but some of them may be quite big. If you are not sure about the size, you have to check the clothing and footwear sizes. They are available in inches and centimeters:

Nike size charts

Adidas size charts

Under Armour size charts