Clothes can make a difference in the perception of proportions, sometimes even more than the shape of the body. Possibly through the appropriate selection of cuts, colors and styling methods, everyone can make their appearance look much more slim without losing comfort or personal style. It is not aimed at concealing the body, but rather at making natural lines more prominent in a harmonious manner. Even minor wardrobe changes can provide a perceptible visual diversity and at the same time be natural and not unnatural.
Choose Structured Fabrics

Clothes that will not gape include medium-weight cotton, denim, or customized blends, which form cleaner lines that will skim as opposed to cling, which inherently make smoother lines. Very slender or overstretchy fabrics tend to point out the areas that are not even, whereas structured fabrics have a slight form of support which visually perfects the overall proportions.
Wear Monochrome Outfits

The single color head to toe dressing minimizes the visual distraction, the eye moves up and down instead of side to side creating a lengthening effect on the body. The concept of continuity and thinness of a straight line can be held even to minor shades within the same color range to ensure continuity.
Focus on Proper Fit

Tight clothes tend to highlight areas of tension whereas loose clothes tend to add extra weight thus a comfortable fit that loosely follows the body should be used to achieve a sophisticated look. Altering clothes such as pants, jackets and shirts according to your size will instantly make your outfit look particularly slim without having to buy an entire new wardrobe.
Use Vertical Details

The visual lengthening of the frame is directed up and down rather than across by the use of design features like vertical seam, pleats, opening at the front or long necklaces. The illusion of tallness and slimness can also be achieved by even minor vertical lines or creases across the center of the pants without making it sound too dramatic.
Opt for High-Rise Bottoms

Waistlines are also visualized to be raised with high-waisted pants or skirts, the legs and torso make them look longer and the torso and legs, then the entire body, are noticeably slimmer. It is also a style that flattens the middle area of the body by adding a soft structure to it particularly when worn together with tops that tuck-in or end just above the waistline.
Select Darker Strategic Colors.

Darker colors will be less noticeable in the eye, i.e. parts that are covered with darker colors will be less noticeable compared to lighter ones, which can be used to consider proportions. The dark bottoms with a little brighter tops would usually result in a flattering focus of attention without losing out on the refined look.
Layer with Intention

The lightweight layering items open-front jackets, long cardigans, or tailored vests are designed to form vertical panels that naturally slim the torso and provide the illusion of three-dimensionality, without being bulky. Layers that are unbuttoned or loosely draped do not cut the body horizontally creating an elongated and thinner appearance.
Pay Attention to Footwear

The color of shoes should comply with the color of pants, tights, or the skin color, which enhances the length of the leg line and makes the whole body look longer and thinner. The shapes of the toes are also points or slightly bulged and this gives this effect as it gives direction and continuity instead of cutting off the shape in a sudden manner.