75% of original size (was 667x19) - Click to enlargeplease can someone help me to fix this

Highlight clothing. Go to modify at the top. Click on conform, then click on calculate collision. You may have to do it a couple of times.
You can also increase size.75% of original size (was 667x19) - Click to enlarge75% of original size (was 667x19) - Click to enlarge75% of original size (was 667x19) - Click to enlarge

thank you very much .

Glad to be able to help you.

I made a Color ID map for that Blazer. You can download it and put it in appearance editor under Color ID.
If you use the Color ID, you will have a different color for the the Blazer (base or black). A different color for the buttons (red).
And a different color for the collar, and pockets. With each different color, you can have different fabrics for that color. A cotton, blazer. A linen collar and nylon buttons.75% of original size (was 667x19) - Click to enlarge75% of original size (was 667x19) - Click to enlarge