Useful sewing machine needles. With these 70 sewing machine needles, you won't need any more for a very long time.
Size 9 for Thin fabrics (such as silk fabrics);
Size 11, 12 for Medium to thin fabrics (such as shirts, undershirts and silk fabrics);
Size 14 for medium to thick fabric (such as spring and autumn coat fabric);
Size 16 for Thick fabric (such as jeans);
Size 18, 20 for thickened fabrics (such as thick fabrics with cotton).