Thank you guys for all the responses!!

I did buy a scale 2 days ago and she came in @ 2.240 gramms.
I guess she's not that small after all.

I fed her a (larger) medium rat about 4 days ago.
So i know the weight should be around 2000gramms.

I fed her this because my pet shop here sucks! And this was the only size they had.

The funny thing was, that it seemed as if she struggled at first, because it took little longer then ususal, but it went down smooth.

What i seemed strange was that after she was done, i put her back in the tank,
Where she seemed to be looking for mord food.
I didnt give her more then 1, but should i give her 2 next time?

Thanks for the replies