On ready made or already sewn tops there are 2 darts that you can sew to reduce the waist ; the single point waist dart which is best for short tops (Those that end near the waist); these are best for ...

Rampe, E. B.; Ming, D. W.; Blake, D. F.; Bristow, T. F.; Chipera, S. J.; Grotzinger, J. P.; Morris, R. V.; Morrison, S. M.; Vaniman, D. T.; Yen, A. S.; Achilles, C. N ...