Men's mountaineering shoes men's outdoor hiking lace up leather shoes mountaineering boots men's sports shoes size: 38.5eu = 5uk = 245mm 39eu = 5.5uk = 250mm 40eu = 6uk = 255mm 41eu = 7uk = 260mm 42eu = 8uk = 265mm 43eu = 8.5uk = 270mm 44eu = 9.5uk = 275mm 45eu = 10uk = 280mm note: [size note] different brands may have different sizes. If you are not sure about your size, please refer to our size chart, And compare it with your foot length. Please let us know as much as possible about your inquiry so that we can help you meet your needs. We are always willing to help as much as possible.