When to Size Up: How Often to Buy Kids' Clothes

Children grow in unpredictable bursts, which makes it hard to know when to buy the next size. Buy too early and clothes sit unworn, too late and nothing fits. Here is a practical guide to when to size up and how to buy smart.
How fast kids grow
Growth is fastest in the first two years, then steadies into regular spurts. Rather than a fixed schedule, watch your child rather than the calendar, because two children the same age can be very different sizes.

Signs it is time to size up
- Trouser hems and sleeves sit noticeably short.
- Waistbands leave marks or tops ride up.
- Poppers strain on bodysuits, or shoes feel tight at the toe.
- Your child says clothes feel tight or uncomfortable.
Buy a little ahead, not a lot
Sizing up slightly makes clothes last longer, especially during fast growth, but going too big means clothes are uncomfortable now and may be outgrown before they fit well. A small buffer is the sweet spot. Our size guide shows how to measure.
Buy smart to save money
- Choose durable fabrics that survive to be handed down.
- Buy fewer, better everyday pieces rather than a large fast outgrown wardrobe.
- Keep your child's current measurements on your phone for quick, accurate orders.
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