These are the updated profiles from BTS' Official Homepage.
There might be a slight difference with the real weight/height.
Rap Monster (Kim Namjoon)
Height: 181cm
Weight: 67kg
Jin (Kim Seokjin)
Height: 179cm
Weight: 63kg
Suga (Min Yoongi)
Height: 176cm
Weight: 59kg
JHope (Jung Hoseok)
Height: 177cm
Weight: 65kg
Jimin (Park Jimin)
Height: 175cm
Weight: 61kg
V (Kim Taehyung)
Height: 179cm
Weight: 62kg
Jungkook (Jeon Jungkook)
Height: 178cm
Weight: 66kg
Seems like this group doesn't have any members who's over 70kg..
Stick Skinny Boy Scouts.
These are Suga and V.... I should start starving myself tonight.
-59kgㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋ
-What in the world.. I ate spaghetti for dinner today.. I should start my diet.
-Whoa, they're really skinny..ㅠㅠㅠㅠㅠㅠㅠ
-I want to throw up everything I ate today..
-Stick Skinny Boys Scoutㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋㅋ
-If you're going to be that skinny then I will be feeling really guilty.. Please be Pig Boys Scout..
-Yoongi-ya.. 59kg.... You're too skinnyㅠㅠㅠ Please gain some weightㅠㅠㅠ
-There are one or two members who got taller!
-I should lose some weight.. ^ㅠ^
