Girls Size Chart in Inches

SIZE       HEIGHT       BUST       WAIST       HIPS
7 small    52                  26.5          23               28
8 small    53-54             27.5          23.5            29
10 med   55-57             29             24.5            30.5
12 lg       58-59             30.5          25.5            32.5
14 lb       60-62             32             26.5            34.5
16 x-lg    63-64             33.5          27.5            36.5
plus sizes
8.5          53-54             29             24.5            30.5
10.5        55-57             30             27               31.5
12.5        57-60             31             28               33
14.5        60-62             33.5          30               36.5
16.5        63-64             35.5          31               38.5
18.5        64-65             37             32               41
20.5        65-66             39             34               43

These are general sizing. Keep in mind that brands are also different. If you are ordering online you may want to order a size up if you are uncertain.Children grow so fast.  If you are buying pre-owned clothing from an online boutique you can always ask the seller to give you exact measurements.
A Country Rose Boutique and Resale