Hello, the size 43.5 in the adidas Predator Club FG cleats usually corresponds to 43 1/3 or 44 in the adidas system. If you wear size 43.5 daily, size 44 would be more comfortable. The model has no pronounced, uncomfortable inner seam on the inside-the inner surface is flat, and comfort is aimed at the areas of contact with the foot. Since the mold information is not specified, it is considered as Standard, choosing half a size larger for scalloped feet increases comfort. If you want me to help you with something different, as KoraySpor, we are always with you.