Above sizes for "tile - tensile" measurements,the error 1-2 cm belongs to the normal range.
SIZE:7 Fit: (12-24M) Height:85-90cm
SIZE:9 Fit: (3Years) Height:95-100cm
SIZE:11 Fit: (4Years) Height:105-110cm
SIZE:13 Fit: (5Years) Height:115-120cm
SIZE:15 Fit: (6-7Years) Height:125-130cm