text: what is the perfect weight for a woman that is 5'7?   it depends on the size of your frame, but for a medium framed woman who's 5'7", the ideal weight is 135 - 139 pounds (61 - 63 kilograms). for a small framed woman, it would be 126 - 130 pounds (57 - 59 kilograms). for a large framed woman, it would be 144 - 148 pounds (65 - 67 kilograms).