These are Vans sneakers that might work just as well for casual parties as for everyday use. The smallest size is 8.5.
Vans - Ultrarange Exo HI Goretex boots - unisex - Fabric/Gore-Tex/Fabric/Calf Suede/Rubber - 7 - Green
VANS
UltraRange EXO Hi GORE-TEX MTE-3 Shoe(Walnut/Gum)