I have 2 what I would call choir robes, although I guess they are also like those worn at a graduation.
They are dark blue.
Mom got them for my sister and I to wear as Halloween costumes, so they've been worn twice. She's moving to a much smaller house and we found these tucked safely away in a storage cabinet.
The size label says 5'4" to 5'6". They are about 50" from the neckline to the hem.
$10 for both.