The official version/short length:  

Interested in working the longer tunic length?

Errata:

At the bottom of page 6, the last three rows of the instructions for the twisted-stitch edging should read like this:

Next row rs:

K across garter, p2, sm, Ltw, k1, Ltw, k2, sm, p2, work in [k7, p2] rib to next m, sm, k2, Rtw, k1, Rtw, sm, p2, work in garter to end. Turn.

Next row rs:

K across garter, p2, sm, k1, Ltw, k1, Ltw, k1, sm, p2, work in [k7, p2] rib to next m, sm, k1, Rtw, k1, Rtw, k1, sm, p2, work in garter to end. Turn.

Next row rs:

K across garter, p2, sm, k2, Ltw, k1, Ltw, sm, p2, work in [k7, p2] rib to next m, sm, Rtw, k1, Rtw, k2, sm, p2, work in garter to end. Turn.

Repeat the above three rows in bold so that twisted ridges are worked diagonally across the k7 ridge, starting a new ridge every third rs row as established until lower front flat section measures about 5″.