Frank Cho tries to keep his anatomy tamed down to human size: look at the proportions of Red Sonja's tibia in the image below from the cover to issue #1. That's actually a truly human proportion, most comic book artists (and fashion artists) will elongate the space between a knee and ankle (something noted in the old John Buscema/ Stan Lee "Drawing Comics the Marvel Way" book from the 1970s).
On the other hand, Cho tends to give all of these muscular woman a bosomy abundance that is generic in the environs of the comic book super worlds, but sort of absurd outside of this particular male-dominated corner of fantasy art. Besides the anatomical anomaly, there is the natural physics of a snowy, freezing world in which a woman can go about in a steel bikini without contracting double-pneumonia. See art without the titles.
Savage Wolverine #1, March 2013, Frank Cho Sky-Diving Wolverine
Savage Wolverine #1, March 2013, Frank Cho Wolverine and Shanna the She-Devil Combat
Savage Wolverine #1, March 2013, Frank Cho Upside-Down Wolverine
Savage Wolverine #2, Apr 2013, Frank Cho Cover art
Savage Wolverine #2, Apr 2013, Frank Cho art - Shanna the She-Devil - 1
Savage Wolverine #2, Apr 2013, Frank Cho art - Shanna the She-Devil - 2
Savage Wolverine #2, Apr 2013, Frank Cho art - Shanna the She-Devil - 3
Savage Wolverine #3, May 2013, Frank Cho 2-page spread with monkeys
Savage Wolverine #4, June 2013, Frank Cho 2-page spread with monkeys
Click thumbnail to see enlarged image size
Savage Wolverine #5, July 2013, Cover art
Savage Wolverine #5, July 2013, Shanna the She Devil aloft
Savage Wolverine #5, July 2013, Hulk and whale
Savage Wolverine #5, July 2013, Wolverine attacks Hulk
Savage Wolverine #5, July 2013, Shanna and Hulk
Savage Wolverine #3, May 2013, Frank Cho 2-page spread with Shanna the She Devil
Frank Cho New Avengers cover #15