If you normally wear casual leather shoes or dress shoes in size 40, it is recommended to choose size 40.
If you normally wear casual sneakers or athletic shoes in size 40, it is recommended to choose size 39.
For individuals with wide feet, high insteps, or wide feet, it is advised to consider purchasing one size larger.
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Contact our online customer service immediately if you encounter any issues during the wearing process. We are here to assist you and look forward to your continued patronage!