Synthetic HEEL HEIGHT-- Approx. 8CM , the Data Slightly Floating Up and Down by Size. TRUE TO SIZE --Please follow the size chart in image. Large Size is available. PROTECTIVE FILM--in order to offer better buyer experience, we have added a protective film on the bottom that is intended to protect from dirty or damage when you try, you can tear them off after deciding to keep the shoes, they all are brand new if you receive a pair with the protective film, so please don't worry about it. AFTER-SALE SERVICE--If there is any damaged or size issue or quality issue, please contact us directly, we will handle it soon until you are satisfied.