I have been a great supporter of Backdoor Shoes for many years & love the product styles & designs & have therefore bought many pairs for friends & family. They are so light & comfortable with such fun patterns. However in the last couple of years the sizing appears to have changed, so I have had to exchange the product, at my own cost. This happened recently when I ordered two pairs of size 4 shoes for my parents. One style fitted perfectly, the other was too small, & that was after they had tried on my size 4’s. I know the sizes are generous, as I normally wear a shoe size 5. If I had ordered a normal size 7 for my father they would have been far too large. As it is, I had to order the black medical grade in womens size as the mens did not go down small enough. Why do you need to differentiate between men & women? My parents may be in their 80’s & their feet have got narrower, but now they have the right sizes they are delighted with the product. Older people certainly find them so easy to slip on & nip outside.