How do i stop my flats rubbing me when worn with bare feet?

I have brought these for school - a href="http://www.shoezone.com/Womens-Flat-Shoes/Black-Grain-Effect-Womens-Ballerina-Shoes/10627" rel="nofollow"http://www.shoezone.com/Womens-Flat-Shoe…/a But they give me blisters when i don't ware socks! (I have tried sock-lets but they irritate me) I DON'T WANT TO WARE SOCKS