Horizontal stripes.

2.

Speaking of stripes, many girls immediately think of "showing fat"! Actually, it is not. Some clothes with horizontal stripes are really easy to look fat, but some clothes with horizontal stripes are just the opposite, not only not fat, but also have a very significant slimming effect.

3.

Generally speaking, the reason why stripes are fat is that when the number of stripes is too small, only one or two, or very thick stripes, stripes will make people "widen". However, if you start to increase the number of stripes or make them thinner and denser until you can't see how many stripes there are at a glance, the gap between stripes will make your brain feel less about "face", and then your eyes will have parallax, thus achieving visual thinness.