Hi, there is something that started make me wonder a little recently.
I am 38 now, 176 cm tall (~69 inches) and 57 kg (~126 pounds). My body proportions never bothered me of course, but I could not avoid to remark that everyone I know in my age has increased its weight, from little to too much, during the last decade.
My life is sedentary (office work), I have a rather varied diet, zero coffee/alcohol, but anyway I always was like that.
I found recently a BMI calculator