From Magknits

Yarn substitutes

Cascade Fixation is a similar cotton-elastic yarn, but will produce a smoother texture. Hold it doubled or use its bulkier cousin.

Sizes

27.5 inch/70 cm bust (29.5 inch/75 cm, 32 inch/81 cm, 34.5 inch/87.5 cm, 37 inch/94 cm, 39.5 inch/100 cm)
The fabric is extremely stretchy and should be worn with a few inches of negative ease—all measurements stretch about 4-5 inches comfortably.