Your welcome!

He's right as well, but Small Medium and Large are names or size names that the seller put on it. The size chart for the MFG (Danville) chenille goes from 00 to 12. See link below.

Next for the Small Medium and Large, that is the 3 sizes that company has decided to offer and I am not sure what the Small is as I don't use that, but the Medium is just size #2. If your talking Crystal Antron that is different again and it only has 3 sizes, Small Medium and Large, but this is a metric type measurement with 2mm, 4mm and 6mm.

Then you get into the Mylar style chenille and is also comes in lots of sizes.

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Danville size chart.
Danville Chenille Company Inc.