Joseph,
If somthing is not uncovering an ervah (and lfi plenty of shitas the leg below the knee is not one) it depends on what is considerd normal in the society that you are in what is considerd prust
“Attention grabbing” is a term that changes from place to place: in Europe 500 years ago or baval in the times of the gemara a woman wearing what is considerd very tzniusdick today would probably be considerd to be wearing somthing attention grabbing. what was considerd attention grabbing 50 years ago may not be attention grabbing today