Has anyone bought maternity clothes from Vertbaudet? They have some nice dresses like this one [http://www.vertbaudet.co.uk/organic-collection-before-after-shiny-fleece-maternity-dress.htm?ProductId=009700034&CodBouw=3138420190&t=6]] but their sizes are odd. I'm normally an 8 or a 10 but their dresses are 6/8 or 10/12. Was wondering if anyone had experience of how their sizes compare