WUIWUIYU womens knee-high boots heel measures approximately 1.2",shaft measures approximately 22.5",opening measures approximately 16.5",if you have thicker calves ,you can loosen the laces or go up one size, otherwise it may be hard to zip up. These knee-high boots feature a classic lacing design for a snug fit inside zipper closure for easy on and off,flat heel for all day comfort. The motorcycle boots are made of polyurethane（PU）, easy to clean and perfect for daily wear, they have an elegant and sexy look, the tie up laces design gives it a unique look instead of the usual basic shoes, and they are easy to break in and hold up fine. These knee-high boots feature a non-slip rubber outsole for excellent traction and slip resistance. Whether you like punk rock style or cool style, this knee high boots will meet your needs, it's the perfect way to show your taste for photo shoots, cosplay, special occasions, biker, concerts, parties, Halloween, and you'll get tons of compliments . Brand WUIWUIYU is a young team established in 2016 in China whom focus on design&produce all kinds of shoes ,designers modestly learn in daily work,many thoughts inspired them and a lot of customers' nice feedback are putted in products.Our outdoor collection ensures you explore the world freely,our indoor collection offers your ultimate comfort,kids collection built on the basis of protection,we hope every pair fit you and you are our future,welcome and enjoy!