The size 16/L in Ralph Lauren is closest to the following:
Brand Label Weight (lbs) Height (inches)
Hatley 12 - 59 inches
J.Crew/ Crewcuts 14 90 - 112 lbs 58 - 63 inches
LLBean 14-16/L - 59 - 63 inches
Marimekko 12 yrs/ 152 cm - 61 inches
MiniBoden 12y - 60 inches
Ralph Lauren 16/L 102 - 115 lbs 61.5 - 63.5 inches