There is disagreement about wearing khazz. Some permit it and others dislike it. The same is true about silk badges on garments except for a thin strip. The first position is in the Qamus while Ibn Rushd takes the second position. There is a third that is unlawful.
Badges are less than a finger in length.
41.5 Clothing 41.5a. When women go out, they should not wear thin clothing which lets their shape be seen. A man should not drag his waist-wrapper out of pride nor his garment out of arrogance. His garment should reach the ankles, as that is cleaner for the garment and shows more godfearing. The same would apply to a woman if she did it out of arrogance.