Clothes problem with my sister

Ok my sister keeps taking my clothes out of my closet . She has autism apparently doesnt know that the clothes wont fit her . Shes about 300lbs. While im 140lbs.
See the difference ?
Therefore she is ruining my clothes and im getting really pissed...

off can someone help me ?
I mean I've put my clothes in a drawer so she wont find them but my parents still hang them up in my closet so I cant keep running in there everytime the laundry is done .

Y don't ya go out shopping with her and you can both get clothes

she cant go out shell try to run away I told my mom to buy her new clothes but she said shell just ruin them but I think its unfair that mine should get ruined thanks to her instead of her own /.

Try talking to your parents and telling them how much your sister's actions upset you and try to get them to see your point. She can't help it, but I understand it's unfair to you. Siblings are hard enough to live with even without Autistic behavior. Is it possible that maybe she just wants attention from you? In the meantime I would suggest hiding your favorite clothes in a different closet or somewhere she can't find them and leaving some of your older clothes hanging in your closet for her to find.

Lock on the door so only you and your parents can access.