Is a 4-0 suture finer than a 2-0 suture?

Answer:
Yes. "4-0" is another way of writing out "0000", and 2-0 is another way of writing out "00". The more zeroes, the finer the suture. US suture sizes generally range from 11-0 ("eleven-ought", which is incredibly fine suture used for eye surgery) to 5 (heavy suture used for orthopedic procedures).
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