ps -- She would disagree that she has "10 pair of pants." She would tell you she has nine pair of ugly pants in her closet that she doesn't even know why are there, and one pair of OK pants.
I also agree that this is not worth yelling about. She is saying, she likes that outfit and she does not like the other options as much. Try to figure out what aspects of it she likes (the color, the fit, the stretch, the comfort, the look) and to go together to find more of the same. In the long run, it DOESN'T MATTER if she does wear the same clothes for two weeks in a row, doing so is not going to keep her out of Harvard. But make it easier on her, buy her some of the same thing in her size. Just make sure it's the same thing TO HER, not just looks mostly the same to you.
My mom and I used to argue about the fit of all my clothes (handed down from my older sister). My pet peeve was bust darts that didn't point to my bust, but somewhere between my bust and my waist, because the item didn't fit. I thought it looked stupid, like I was wearing the wrong size clothes. My mom would yell, "NOBODY WILL NOTICE THE DARTS!" But, I did. And I was the one she was asking to wear them. My sister's clothes were appropriate for her (brown eyed brown haired) coloring, also, and I'm a blonde with blue eyes. She looked great in lime green, I looked sick in lime green. But my mom, with her eye on the budget, simply scolded me and she never once asked me what kind of clothes I liked the looks of.
Try going through a young teen fashion magazine together, and see what she likes. Or a catalogue. She will tell you if you put a sock in it with the judgment and just make like a supportive friend. Then you can go shopping together and maybe you can make some intelligent guesses.
I agree with SM - ask her why.
Does she think she looks best in those pants? Are they really easy to put on or take off (no zipper, etc.)?
Does she have sensory issues with other clothes like tags on shirts?
Hi there and welcome. Well, kids are people too and are going to have preferences for what they like to wear just as we do. I don't buy myself turtlenecks because I don't like how they feel and I don't buy certain fabrics because they aren't comfy.
Have you tried talking to her about what the problem is? Does she go shopping with you? What about buying similar things to what she likes (same brand, different colors for example)?
I think making a battle of this is not necessary and certainly not yelling. She's not trying to drive you nuts but is simply trying to be comfortable.
This only began two years ago?