There is a considerable difference between the fit of a textile motorcycle jacket and a leather motorcycle jacket. Where a leather motorcycle jacket stretches and adjusts to the shape of your body, a textile motorcycle jacket will not. Do you want a textile jacket and will you wear it especially in wintertime? Then you will probably wear another layer of clothing underneath the jacket. In that case, keep in mind to save some space for that extra layer. Will you wear the textile jacket on warmer and sunnier days? Then make sure that the motorcycle jacket fits well and feels comfortable immediately. A textile jacket won’t stretch that much after wearing it a few times, so you do not have to consciously buy it ‘too small’. While buying a leather motorcycle jacket you do want it to feel like it’s a bit too small and too tight, especially a sports or racing jacket. You will only wear a thin layer underneath the jacket, such as undergarments or a thermal shirt. A leather jacket can stretch up to half a size. That’s why leather jackets can fit real tight when purchased. Do you want a casual leather motorcycle jacket? Then the jacket can fit a bit wider from the start. These jackets tend to stretch a little less.