The heel is approximately 2 1/8" wide to keep you stable.
The Suede Sole is quite flexible and the heel has a synthetic bottom that won't slow you down when it touches the floor during a spin.
ABOUT SUEDE SOLES:
These fit pretty true to size for women with Normal or Narrow width feet.
Women who've tried these on report that these are fitting either perfectly or a half size smaller than their street shoe size (i.e. if you normally fit 7.5 -to- 8 you'll probably wear an 8 and sometimes an 8.5 in these).
Second pair of this style? If you bought one of these when they first came out then there's a small chance that they won't fit exactly the same as your original pair.