Your thighs may simply be large because you have a lot of fat in this area – fatty thighs. As explained above, most women will have a natural tendency to deposit fat in their outer and inner thighs. Unfortunately, this means that this is one of the last places fat then the shift, which means you need to be patient and determined to see results. For women legs tend to slim around a body fat percentage of 18%. Therefore, you can strip away thigh fat, to get slim thighs, but it will take time. Use the body fat calculator to determine your body fat percentage.