It maybe that the denim is not of good quality or that you have lost weight, i prefere victoria Beckham's line in jeans the never get baggy but are expensive,
Why are my jeans always loose when I wear them? I am a size 4 in jeans. I have a 24 inch waist if you want to know.
My wife has the same problem. She found switching to "curvy" style jeans works better (as they have a smaller waist than hip).
Most jeans that are regular fit, my wife has a gap at her waist that I can stick my arm in (not small).
Some jeans are of a loose fit design even though they look skinny in the store.
Lol i think u should get a size 3 but i think that ur waist is ok so no worries on that all i have to say is get a small size hunn! :)
I prefare tight jeans they realy do things to some women. But it takes me an age to find ones that fit properly.I think it a case of keep on trying different labels.