According to the our hair factory sales report, the ranking list .

1. Straight hair & wigs and body wave hair & wigs about 55.68%
2. Deep wave wigs and deep wave hair bundles about 14.43%
3. Kinky Curly wigs and Kinky Curly hair bundle about 10.66%
4. Loose Wave wig and Loose Wave hair bundles about 8.65%
5. Loose Curly wig and Loose curly hair bundles about 6.52%
6. other texture is about 9.46%

this ranking list is from 2015.Mar–2020.Aug sales date of FSN hair factory, it mainly for lace wigs and hair bundles products, the European colored wigs, mono wigs, custom made wigs and OEM wigs do not included in, these wigs mailly the straight texture.

I hope it is useful for the question.