Thank you for reaching out. Some customers who fall on the upper end of a size run do choose to size up due to the snug, performance fit of our socks. We know it can be tricky to shop for socks online so we got you covered with free return shipping for exchanges or returns for 90 days on all orders placed on our website, just in case!
Please let us know if you have any additional questions or if there is anything else we can do to assist you.
All the best,