Armhole
Sizes 32 (36.5, 39.5, 43.5, -)(-, -, 61, 65)" Only
Next Row (RS): K2, work as established to last 4 sts, K1, P1, K2.
Next Row (WS): Sl1 WYIF, P1, K1, P1, work as established to last 2 sts, P1, K1.

...

Sizes - (-, -, -, 48)(52.5, 56.5, -, -)" Only
Next Row (RS): K2, work Row - (-, -, -, 17)(1, 17, -, -) of Right Armhole Extension Edge, work as established to last 4 sts, K1, P1, K2.
Next Row (WS): Sl1 WYIF, P1, K1, P1, work as established to last 12 sts, work Row - (-, -, -, 18)(2, 18, -, -) of Right Armhole Extension Edge, P1, K1.