How we compare kids' size charts

Published brand size charts only: the height range each brand gives for each size label, taken from the brand's own chart.

The height range each label covers, in cm. For every label we set the brand's published range next to the ranges other brands publish for the same label.

Fit. Chest, waist, hips, rise, stretch, fabric and cut are not compared. This is not a fit study, and the size-label articles make no claim about how clothes fit a child.

Brands that publish in inches are converted at 2.54 cm per inch.

Plus, husky, slim and extended fits. Tops charts are used; bottoms only where a tops chart has no height range.

Where an article sets a label next to a typical child of the same age, the typical-child figure is the median height from the CDC 2000 growth charts (stature-for-age and length-for-age). It is a reference point for the label only, never a fit claim.

• Age labels (UK and European style, for example "5-6 Years", "104 (3-4Y)", "6 years"): 51 brands, ages 2 to 14, 383 chart rows, published charts, as of October 2026.
• Number sizes (US style, for example 4, 6, 8, 6X): 20 brands, sizes 4 to 14, 327 chart rows, boys and girls kept separate, as of October 2026.

Both datasets use the brand's own published height ranges in cm.

• Some brands round their ranges to whole inches, which leaves small gaps between sizes in the chart.
• Some brands publish two ladders in one chart (Carter's, Next, Primary). These are read as published. Amazon Essentials' chart lists overlapping ranges for sizes 7 and 8.
• Number sizes are treated as an age of N years only when they are compared with age labels. All cm comparisons do not depend on that assumption.
• Charts change. The data shows published charts as of October 2026; check the brand's own chart before buying.

If a figure does not match a brand's current chart, email support@tryoutgrow.com with the brand, the label and a link to the chart.