Hereâ€™s our list of 10 hair companies that sell naturally-textured hair extensions for the gal with kinky/curly hair. Most of the companies offer a variety of options including wigs, clip-in wefts. Hair in 12 to 26 inches, 3.5-4 oz bundles. This clip can be opened and snapped under the natural hair of the woman. To apply them at home, the natural hair have to be first divided into a number of small sections, approximately of one inch. of clip-in human hair extensions is that with a.