Jill,

I have found that when cutting syringes that partially filling them with very
hot water for a few minutes helps to make them more pliable and gives a less
jagged cut.  I use either a very sharp knife or a one-sided razor blade.  I
also take the size of the mother's nipples into consideration.  Some do well
with 12 cc syringes while others are more comfortable with the 20 cc size.

Sharon Coe LVN IBCLC