They average skirt on a factory jig or spinnerbait is between 40-50 strands. If you are using the standard silicone skirt tabs form Jann's etc. they are about 22 strands per tab. On clear water baits I use 2 tabs, stained 2 and a 1/2, 3 for muddy water and the most I have ever used was 4 tabs but they had trouble fitting into the skirt collar.
Allen