one size fits all?

My right foot was killing me — there was a big red spot on my little toe, and it was aching. The left foot was perfect though — supposedly these shoes are really comfy, so I couldn’t figure out why the right foot felt so tight. It was terrible. Finally I had to slip my shoes off and slide them under my desk…I had to go barefoot for the afternoon. I looked down at my cute little gold shoes and just wondered, why? What is making my poor little foot hurt so badly, they feel fine in the length…then I saw it. The right shoe was a half size smaller than the left! Haha, well, at least it gave me a good laugh!