Open Question: How to get legs like this...?

http://www.urbanoutfitters.com/urban/catalog/productdetail.jsp?itemdescription=true&itemCount=80&startValue=1&selectedProductColor=&sortby=&id=1766206&parentid=W_BOTTOMS&sortProperties=+subCategoryPosition,+product.marketingPriority,-product.startDate&navCount=147&navAction=poppushpush&color=&pushId=W_BOTTOMS&popId=WOMENS&prepushId=&selectedProductSize= I'm really tall, and I have long legs