你好。我是很悲伤。

P.S. In English, you say "I am sad. I am fat.". The sentence structure is "Subject + be verb + adj.". 

       But in Chinese, especially oral Chinese, we are not used to using the "be" verb ahead of an adj.. 

       Typical Chinese to express "I am sad":

       我很(very)悲伤。

       我非常(very)难过。

       Using a "be" verb is Okay though. To be grammatically correct, it could be like this:

       我是悲伤的。

       Cause "悲伤" can be both a noun(sorrow) and adj.(sorrowful) in Chinese. 

       If you say "我是悲伤", it's like "I am sorrow", which is a little weird, but this might appear in a Chinese poem lol.

       So here we put "的" following "悲伤", to show it's an adj..

       Speaking of height and weight, it's "I'm 5‘6 and 119 lbs" in English.

       Still, we Chinese don't quite like using the be verb here. You can just say:

       我身高167cm，体重54kg.

       Saying "我的(My)身高(height)是(is)167cm, 我的(My)体重(weight)是(is)54kg" is acceptable but that's verbose.

       Another sentence. I guess you wanted to say "Chinese women are petite and cute."

       In Chinese, "小" means “small”. It's often used to describe the size of something instead of someone. It can        also mean someone is young. 

       When you want to describe a female's figure as small, you can use "娇小". 

你好。我是很悲伤。

你好。我是真悲伤。

你好，我是悲伤。