Bulk is the enemy of layering and yellow is the enemy of hesitation. When both problems are solved in the same cardigan, something genuinely useful happens to your wardrobe. We spend a lot of time thinking about what actually works under a blazer or over a slip dress without creating that lumpy, stiff situation where nothing sits right and you end up removing the layer entirely by lunchtime. Yellow cardigans, done well, solve the colour question and the practicality question at the same time. A good one in butter or marigold or sharp primrose adds warmth to an outfit in both senses. It reads as considered rather than thrown on. The cardigans we’ve pulled together here are the ones that lie flat, button neatly, and don’t add visual noise when worn underneath something else. Fine knits, lightweight ribbed options, shorter cropped styles that don’t bunch at the waist. Yellow has this quality where it lifts everything around it without demanding to be the only thing you notice. These cardigans earn their place in a wardrobe by being genuinely useful and genuinely beautiful at the same time.