True Age        Size                 Weight             Height            Inseam           Waist             Head
Preemie/NB    Up to 7 lbs       Up to 7 lbs       Up to 19”         5½”                 14”                14¾”
0-3 m              0-3 m              7-12 lbs           Up to 23”         6¾”                 17”                14¾-16½”
3-6 m              3-6 m              12-17 lbs         23-25”             8”                    17¾”              16½-17¼”
6-12 m            6-12 m            17-23 lbs         25-29”             9¼”                 18½”              17¼-18½”
12-18 m          12-18 m          22-27 lbs         29-31”             10½”               19¼”              18¼-19”
18-24 m          18-24 m          27-30 lbs         31-33”             11¾”               19¾”              19-19½”
2 years            2T                   30-32 lbs         33-36”             13”                  20¼”              19½-20½”
3 years            3/3T                32-35 lbs         36-39”             14¼”               20¾”               20-20½”
4 years            4/4T                35-41 lbs         39-42”             16”                  21¼”               20-20½”
5 years            5/5T                41-46 lbs         42-45”             17¾”               22”                  20½-21½”
6 years            6                     46-51 lbs         45-48”             19½”               22½”               20½-21½”