I knew there have been various sizes of these Celica Supra rims: 15 inch 6J (mine/Supra/Soarer/Carina), 14 inch 7J (the most wanted), 14 inch 5.5J, but apparently there was also a 13 inch (5J?) rim made:
WTF: 13 inch Celica Supra rims
Aren’t they cute??? ;)

Found at Club4AG