# item.guide
Side-by-Side Comparison Clothing Sizes

Kids & Baby Clothing vs. Women's Clothing

Comparing 2 standards across 12 specifications. 12 key differences identified.

Comparing:
Kids & Baby Clothing
Women's Clothing

Children's clothing sizes standardize growth stages from Preemie and Infant (0–24M) to Toddler (2T–5T) and Youth (Sizes 4–16), establishing height in centimeters/inches and weight in pounds/kilograms as primary fit metrics over calendar age.

View full Kids & Baby Clothing spec sheet →

Women's international clothing sizing matrix cross-references standardized garment sizes across the United States (US 0–20), United Kingdom & Australia (UK 4–24), Continental Europe (EU 32–52), Italy (IT 36–56), and Japan (JP 3–23) with body measurements.

View full Women's Clothing spec sheet →

Specification Comparison Table

12 Parameters
Parameter / Spec
Governing Standards
ASTM D4910 (Baby) / ASTM D6554 (Toddler/Youth) / ISO 3635 ASTM D5585 / EN 13402-3 / BS 3666 / JIS L 4005
Baby / Infant Stage
Preemie, Newborn, 0-3M, 3-6M, 6-9M, 9-12M, 12-18M, 18-24M
Toddler Stage (T)
2T, 3T, 4T, 5T (engineered with extra room for diapers/training pants)
Youth / Kids Stage
Sizes 4, 5, 6, 7, 8, 10, 12, 14, 16 (Alpha XS to XL)
European System (EU)
Sized directly by child height in cm (e.g., EU 104 = 104 cm tall child / ~4 years)
Primary Fitting Metric
Always use Height and Weight rather than age for optimal fit
Standard Sizing Range
US 0 (XXS) to US 20 (3XL)
US to UK Offset
UK Size = US Size + 4 (e.g., US 6 = UK 10)
US to EU Offset
EU Size = US Size + 32 (e.g., US 6 = EU 38)
US to Italy Offset
IT Size = US Size + 36 (e.g., US 6 = IT 42)
US to Japan Formula
JP Size = (US Size × 2)–1 (e.g., US 6 = JP 11)
Petite vs Tall Inseams
Petite (≤5'3" / 28" inseam) | Regular (5'4"–5'8" / 31") | Tall (≥5'9" / 34")