First of all, if you are short and fat, you have to foster strengths and avoid weaknesses, and choose a slim coat. However, if you want to wear school uniforms, you can wear dark series of thick stripes and try to avoid wearing clothes with horizontal stripes and vertical stripes. Comparatively speaking, diagonal stripes are the thinnest. If the thighs are thick, you can choose pants with simple style, dark color and light fabric.