US: 4T-5T to Europe Size 122-128
Cross-market children’s underwear, briefs, boxers, training pants, undershirts, bras, and thermal tops conversion mapping 4T-5T specifications into 122-128.

Analyzing Undergarment Size Equivalence Across Markets
US: 4T-5T: Corresponds to a height baseline of 110 (43.3 ) and a waist baseline of 53 (20.9 ).
Europe Size 122-128: Corresponds to a height baseline of 128 (50.4 ) and a waist baseline of 58 (22.8 ).
Other Conversions to Europe Size 122-128
US: 2T-3T → eu-122-1282T-3T to eu-122-128
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US: 4T-5T → eu-122-1284T-5T to eu-122-128
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US: XS (4-5) → eu-122-128XS (4-5) to eu-122-128
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US: S (6-7) → eu-122-128S (6-7) to eu-122-128
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US: M (8-10) → eu-122-128M (8-10) to eu-122-128
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US: L (12-14) → eu-122-128L (12-14) to eu-122-128
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US: XL (16) → eu-122-128XL (16) to eu-122-128
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