Where is 'acceptable' for a tallish, very slim 14yo. She hates shopping so won't go herself and lives in jeans. I think she'd be OK in an adults size 6 but she's weirdly fussy about cut and style and, oh, I don't know, just EVERYTHING. Can't tell me what she wants but doesn't like anything I suggest. All her current (much loved) jeans I've bought abroad but although they still fit fine round the waist and hips they are getting short in the leg AGAIN. I have no idea about brands. hellllp. She doesn't like skinnies or flares or any embellishment.