Baby & Toddler Clothing Sizes: A Simple Fit Guide

Shopping for baby and toddler clothes is easier when you know how the sizes work. This guide explains how baby clothing is sized, how to pick the right fit, and when to size up. Browse our baby and children's clothing.

How baby clothing sizes work

Most baby clothing is sized by age in months, such as 0-3, 3-6, 6-9, 9-12, 12-18, and 18-24 months, then moves into toddler sizes (2T to 5T) and kids' sizes. These are general guidelines, not exact rules, because every baby grows at their own pace.

How to choose the right size

  • Go by weight and height, not just age. Babies vary a lot, so a chunky three-month-old may already be in 6-month sizes.
  • When in doubt, size up. Babies grow fast, and a little room means more wear. A slightly big outfit beats one outgrown in a week.
  • Think about the season. Size up for cooler months when you will layer, and plan ahead so the size fits when the weather matches the outfit.

Shop baby clothing by size

We carry boutique baby and children's clothing across sizes, from 0-3 months and 3-6 months up through 18-24 months, plus toddler (2T-5T) and kids (sizes 4-12). Round out the outfit with baby and children's accessories.

Care and comfort tips

  • Choose soft, breathable fabrics for everyday comfort, and check tags for wash instructions.
  • Look for easy changes, like snaps and stretchy necklines, especially for newborns.
  • Wash before first wear to keep delicate baby skin happy.

Make it personal

Adding a name or monogram makes a sweet keepsake or baby-shower gift. See our custom embroidery guide, or start a custom order.

Come find the perfect outfit

Browse children's clothing, or visit us in Belle Vernon. We serve the Mon Valley and Greater Pittsburgh area and ship across the United States.

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