They are approximately 120 lbs each.
Kendell Jenner's vision is very good. She does not wear corrective lenses.
NHL player Boone Jenner weighs 202 pounds.
NBA player Kendall Marshall weighs 195 pounds.
She weighs 105 pounds
I think 81 pounds
NFL player Kendall Reyes weighs 300 pounds.
NFL player Kendall Langford weighs 313 pounds.
NFL player Kendall Wright weighs 191 pounds.
NFL player Kendall James weighs 175 pounds.
NFL player Kendall Gaskins weighs 238 pounds.
NFL player Kendall Hunter weighs 199 pounds.
If you look Kendall Jenner up on Wikipedia you will find out everything you need to know. Her height has grown 2 inches and she is now 5'11. She weighs 106 lbs. Calculating on a BMI she is 15.7 which is far below underweight. If you want to be like her you will be in risk of underweight problems. Coming from her background she is naturally thin and does not do any specific 'health and diet' in her routine. She wears a Small in clothes and she is a 2-4 in dresses.