Reformation Tefi Knit Top Mineral Blue Size Small New with tags and packaging The model is wearing a size XS and is 5'7", 23" waist, 34" hips, 32" bust. Designed to be fitted throughout. See our size & fit guide. The details Cotton Cinch is a lighter weight stretch fabric with a soft handfeel made with 88% organic cotton, 12% spandex. Wash cold + dry flat. More on fabric & care.