I was wondering when should thin be used and when should slim be used to express lacking weight:

My friends say that I am too thin.
My friends say that I am too slim.

If they are different, what would be examples of better usage?

  • 3
    "Too slim" is a more positive word, IMHO. If I wanted to say that the friends are concerned with my low weight, I'd go for thin. Commented Dec 11, 2015 at 9:33
  • 1
    If you have little flesh on the body that make you look rather unattractive, people may call you thin. If you have a little flesh on the body wished for an attractive figure, people will call you slim. In other words, thin has a negative meaning, whereas slim has a positive meaning.
    – Khan
    Commented Dec 11, 2015 at 10:13

1 Answer 1


thin and slim may mean the same thing but they are not synonyms. 'Slim' largely means being in a good shape not with big muscles or fats. The body is not broad or bulky. Actually a slim person is thin but attractive.

On the other hand, 'thin' refers to a person who looks thinner than she should be to look attractive. slim is more positive than thin. 'Slim' could be appreciating someone.

If your friends say that you are 'thin', they probably care for you and want you to put on some weight.

These days, looking 'slim' is on the rage. So, if you meet a celebrity, calling her 'slim' pleases her; calling her 'thin' may make her face frown!

I'll suggest not to use 'too'. Instead, simply say ...

You look 'thin'

In case of 'too thin', say...

You look 'very thin'

There's one more word - skinny; but use it with caution!

  • You forgot scraggly, anorexic, dystrophic, scrawny, etc. Anyway, your answer is wrong and extremely confusing.
    – Ricky
    Commented Dec 11, 2015 at 10:46
  • You are taking it medically! You should post an answer to avoid confusion from this answer. @Ricky
    – Maulik V
    Commented Dec 11, 2015 at 10:58
  • 1
    Maulik, Not with big muscles. What an idea!
    – Khan
    Commented Dec 11, 2015 at 13:34

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