4' 11" height, 90 pounds weight, BMI:18

150 cm height, 41 kg, 6 stone weight

Here are some pics for your height-weight chart. She could fill nicely the bottom left case of your chart :p She's 4'11" and about 90lbs (actually 89 i think).
She's my girlfriend, her name is Katharine, and she's a little pice of love ;)