The Crocs Echo Boot in Dusty Olive is a stylish women's boot in UK size 4. Made with a synthetic upper material in a green colour, this bootie-style shoe by Crocs is perfect for adding a touch of comfort and style to any outfit. With its versatile design and brand reputation, this new with tags (BNWT) boot is sure to become a staple in any woman's wardrobe. I am a uk size 4 however these boots are swamped my feet. I’d say they are good uk size 5.