Enlisted Ratings for pay grade E1, E2 or E3 are supplied as three stripes just like full size.  Cut off what you don't need.
Price is $4.00 each embroidered.  Select Blue or white backing and which rating group. No insignia on chambray or working jackets.

U.S. Navy Petty Officers Rating Badges

This page is illustrated with a Boatswain's Mate First Class and a QMC but any  rating is available just specify the code . For Gold Rating add a G after the last letter.  ie TM-G for a  Torpedoman's mate,  ADCS-G  for a Senior Chief Aviation MM etc.