Check out fabric materials packs from Travis Davids.
Get 6 samples of materials from the complete 56 fabric materials pack.
Some technical details:
If you want to get a bigger collection, there are 24 or 26 fabric materials packs as well as a full package pack with 56 materials (listed below).
The information on licenses can be found here.
The first part of the complete pack from Travis Davids.
This pack has the same technical features listed above except for the included maps (Diffuse, Normal, and Roughness only).
The commercial use and license information remain the same.
The second part of the complete package with the same characteristics. There are all 5 maps for each material.
Get a full collection of the fabric materials from Travis Davids.
The materials have the same technical features as the above-mentioned packs. The collection includes Diffuse, Normal, Roughness, Metallic/Specular, Opacity maps.
You can use these materials in any project you need, including commercial projects. There are 4 types of licenses provided for this pack: single user, the team limited to 10 users, the team unlimited, and educational.