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The numbers associated with sewing machine needles use a European and an American labelling system. So if you see 75/11 on a needle card, the 75 is the European equivalent of the American 11. If the numbers are reversed (11/75) it’s still the same needle. As the chart shows, the American system uses 8 to 19 with the 8 representing a lighter, finer needle and 19 representing a heavier, thicker needle. The European sizes range from 60 to 120 with 60 representing a lighter, finer needle and the 19 representing a heavier, thicker needle. A good choice for a delicate fabric would be a size 8/60 needle. For heavier, sturdier fabrics a size 19/120 would work best. Depending on your desired effect, you might do some experimenting on scrap fabric if you are using a unique thread and/or fabric.