I recently started hiking and wanted to find a good pair of hiking hoes that are light. These shoes are pretty light but I wear an 11 in women., so I ordered an 11 and these shoes were super uncomfortable on my feet. they felt tight and ached after 20 minutes of walking around in them on my carpet at home. I would say order 1 full size up, maybe 1.5. I have purchased 4 pairs (3 in men, and in men I wear a 9) I'm currently up to a size 10 in men and I feel I need to go up one more size. My toes keep rubbing at the tips of the shoes in the 3 pairs of men Merrell brand I've purchased. I'll leave a review on the men pair once I get a size that works.