How to Dress Long Legs/Short Torso
When deciding what to wear is important to know your vertical body proportions. If you have long legs you should bring the attention to them. This is one of your pluses so make sure you put the accent on your lower body (and your face of course). Wear long skirts, skirts with pleats, details and patterns. To create a balanced look avoid mini skirts as this will make your legs look out of balance but you can wear mid-thigh or knee lengths. Experiment with hosiery in different colors or with patterns.
In general try to bypass the waist. Avoid high waist lines and big belts because this will make your short waist appear even shorter. Choose drop waistlines, hip belts, longer tops and sweaters and longer jackets to create length.
If you are not sure about your proportions do your body analysis here.