"The jacket is too small for her."

Translation: Die Jacke ist ihr zu klein.

[Janet240519]

They printed Das Jackett - haven't seen that before.

[mizinamo]

I'm guessing you used das Jacke, with the wrong article -- it should be die Jacke since the word Jacke is feminine.

[person243]

"Das Jackett" is the jacket you wear in a suit. It is a possible translation though not really that plausible considering the context.

I hope I could be of help.