UNWORN - As stated
SUPERB - Very light vamp creasing, no marks.
EXCELLENT - Light vamp creasing, maybe one or two minor marks (only noticeable on very close inspection).
VERY GOOD - Vamp creasing, a few more marks (only noticeable on close inspection)
GOOD - Noticeable vamp creasing, maybe some minor leather cracking & more noticeable marks, but still in acceptable condition.
FAIR - Not recommended for a job interview or first date!