They DO run 1.5 sizes small! I read the reviews at the 11th hour and was able to change my size.  So glad I did.  They fit perfectly.  They look really cute also.  The "patent" look is very sassy.  Who does Zumba that can't appreciate "sassy"?  I've received lots of compliments.  Only concern is they're a little slippery.  I need to scratch the bottoms, otherwise they're a great shoe and I'm pleased!