since all the pins are handmade in the factory, there will be flaws. so this pin grading help you to decide how to choose your pin. Thank you
STANDARD GRADE: Near to perfect pins. (no pins are perfect!)
B-GRADE: Small flaws. (ex: small specks/dot, metal imperfections, enamel underfill, etc.)
C-GRADE: More major/noticeable flaws. (ex: deep underfill, larger random enamel paint streaks, missing enamel, wrong enamel color fill, etc.)*
pins grading is subjective to each pin maker. no two pins are the same.