Thank you for your interest in this quality frame with a history of light to moderate use. There are paint chips, surface marks and scratches. The down tube has a small dent along the non-drive side between the N and the T in the word GIANT. The dropouts, bottom bracket threads and head tube are in good shape.
Measurements:
Seat tube center of BB to collar: 14.5”
Top tube center to center actual: 20”
Head tube: 1” w/ threaded headset
Seatpost: 29.4mm
Bottom bracket: 68mm