I have been buying this type of boots for decades. I get these and the opening is so narrow I can't even get my feet into them. Using a tape measure arround the outside rim I get 13.5 inches semi-rectangular shape opening, (w/ 3. 5" front to back and 3" wide non flexible). My previous pair is 15.5 inches almost oval shape opening (w/ 5.5 front to back and 5" width very flexible). Terrible change in design. Avoid this product.