How quickly do two year olds' feet grow? Also Kickers boots Q!

[beccajoh]

There's some Kickers boots I want to order for DD for this winter (they're half price) but I'm dithering because I don't know how quickly her feet might grow? Probably how long is a piece of string question to be honest! She's currently a 7 so was thinking of ordering the 8 and hoping for the best?!

Does anyone know how kickers fit these days? I read reviews saying size up and others saying they're true to size.