Mini Small Square & Round Glass Craft Mirrors Mosaic Tiles. Bulk Wholesale Cheap 100 Pieces Pack. Mirrors are Approximately 1/16 Inch Thick. These are craft mirrors so they can come with slight imperfections. Mirrors can help turn all your arts and craft projects into something spectacular without spending a lot. Even the smallest mirrors make a big impact in a multitude of craft and home décor projects. We carry craft mirrors in all sizes and shapes. We promise to take extra care in packing your orders!