Several girls I have met want to try before they buy. This is understandable. So there is a place with a pretty good selection. It is a sex shop, but hey, they dont sell these gals at Barney's. The store with shoes n' more is on 8th ave between 47 and 48th. It has 3 levels. Shoes are on the second level. As always you know what I recommend, 6 inch platform. You can read more here http://www.stripxpertease.com/2006/12/heels-or-no-heels.html
