"To elongate a look" means to make something appear longer than it actually is, typically referring to the visual impression created by someone's appearance or clothing style. Full definition
-RRB- will match just perfectly with tights having arrow - like patterns, which will also visually elongate the look of your legs apart from matching your dress. (heduy.com)
This is no different — I took this flowy peach frock and layered the high - waisted striped skirt overtop to create a really smooth, elongated look with mile - long leg and volume up top. (cominguprosestheblog.com)