Nike women’s clothing often runs a bit small, especially in fitted performance styles designed to sit close to the body. Many shoppers find tops and sports bras feel snug through the chest and shoulders, while leggings can feel tight at the waistband if you’re between sizes. That said, sizing isn’t uniform across every line—lifestyle pieces and relaxed cuts can feel more true-to-size than training gear.
If you’re between sizes, prefer a looser fit, or plan to layer (like wearing a hoodie over a top), sizing up is commonly the safer choice. This is especially true for compression or “tight fit” items where the fabric is meant to stretch and hold shape. If you want a sleek, body-hugging look and don’t mind a snug feel, sticking with your usual size may work well.
Nike frequently labels fit. “Tight” and “slim” silhouettes will naturally feel smaller than “standard” or “loose,” even when the size number is the same.
Performance fabrics with spandex are designed to compress and move with you, which can feel smaller at first try-on. Cotton or knit lifestyle fabrics typically drape more and feel less restrictive.
Necklines, armholes, and length can change the feel. Sleeveless and fitted tops may feel snug at the upper body even if the waist feels fine.
Start with your usual size, then consider sizing up if you want extra room in the chest/arms or you dislike compression. When possible, compare your measurements to Nike’s size chart and prioritize bust and waist for tops. For a style-specific example and fit notes, see the main guide here: https://brillaria.com/guide-nike-womens-sleeveless-black-print-top-round-neck-fit-styling/.
Use bust and waist measurements first, then choose based on your preferred fit: stay true-to-size for a close fit or size up for more breathing room through the chest and armholes.
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