Simple. Wearing clothes with a standing collar or a long collar, such as shirts, sweaters, coats and coats that can cover the neck, invisibly increases the width of the neck and makes others feel that the neck is thin. In addition, thin people need to wear slightly loose clothes. When they meet striped tops, they should wear horizontal stripes instead of vertical stripes. People with vertical stripes look straight, while horizontal stripes give people a wider visual effect.

Try it yourself.