Our Size Fit US Size Dress Length Bust Sleeve Length 100 2T 54 58 34 110 3T 57 60 36 120 4T 60 62 38 130 5T 63 64 40 140 6T 66 66 42 150 7T 69 68 45 Our Size INT US UK FR 80 80 1 9-12M 12M 90 90 2 1½-2Y 23M 100 100 3T 4Y 4A 110 110 4T 5Y 5A 120 120 6T 6Y 6A 130 130 8T 8Y 8A 140 140 10T 10Y 10A 150 150 12T 12Y 12A 160 160 14T 14Y 14A *Measurements shown in the Size Conversion Chart refer to body measurements.