Bob told Maria her new dress

[Bassim]

I am wondering if my sentence is grammatically correct.

Bob told Maria her new dress made her look smaller, but she caught a hint of insincerity in his voice.

 

[bhaisahab]

By 'smaller' did you mean 'slimmer'?

 

[Bassim]

Yes.
Should I have written "slimmer" instead?

 

[bhaisahab]

It would make more sense.