Nike. Nike is pretty well-known for running small, particularly their shoes. Unless you have narrow feet, you will almost certainly want to order a size larger. Those with particularly wide feet may need to go up 1 ½ sizes.

Does Nike half size?

And here is where it gets complicated; for smaller sizes such as US 6 and US 6.5, Nike applies a half-size conversion. All this can make anyone's head spin, so here's an easy trick. Out of the four, only the CM (short for centimeter) represents the actual length of the foot which is likely to fit in the shoe.

Do Nike running shoes fit true to size?

Despite being notorious for running small, Nike shoes actually run true-to-size across the board. Its sizing may differ from specific brands but overall, its scheme is quite close to the average.