Clothing donations for 3xL-6xL women's clothes

Had a family member (mid 40s female) pass away recently and we're looking to donate her entire closet of clothing. The sizes of the clothing range from 3xL -6XL (and possibly larger). I think this is a pretty difficult to come by size (lots of her clothes had to be special ordered), so our family is wondering if there's a specific charity or place we could donate these items to best help people trying to obtain these sizes of clothing. Any suggestions would be greatly appreciated! Open to suggestions in the GTA as well and not just Toronto. Thanks!