Notes on materials:
The main yarn for both the tank needs to have some stretch.

490 (555, 605, 685, 740) yd. worsted-weight yarn with stretch (long torso add 25 30, 30, 35, 35 yd.; full bust add 15 20, 20, 25, 25 yd.)
crochet hook, 5.00mm (US size H)
measuring tape