Fits nicely just like the old pair of size Medium Crocs which I have been wearing for 20 years. The old ones are now getting worn at the bottom and I thought they might fall apart and I won't have a pair of comfortable Crocs to wear. But the old ones are still really comfortable. Now, I wear them both - alternating the old and the new Crocs after each wash. Am really surprised that the old Crocs are still in excellent condition after 20 years!!