Carbon footprint and the green issue?

i take a size 9 shoe and i wanted to know a few things about the following, if i took say a size 11 would i leave a larger carbon than before? also if i walked on stilts with only a small surface area touching the ground would the print be too small to calculate? i want as many views as i can because this is a serious matter we are talking about and needs too be addressed ( no time-wasters please)