Using the size chart on the Columbia website was able to determine the exact fit the first time. These shoes are stylish, very breathable and comfortable. I usually need a break-in period with hiking boots, but I didn't need it here. I've used them for hiking and so far have been very impressed with the grip and traction on rocks and sandy surfaces. The only complaint I have is that after 20 hours of walking some of the glue on the toe cap is no longer sticking to the sole.