An app that helps people to remind sizes

How often are you out and about or online shopping and you see just the trousers/tee/jacket/shoes you were looking for but you don't remember the exact size?
Because every brand have sizes that suits differently to remember sizes it's not always an easy thing to do.
Wouldn't it be nice to have an application with those details listed on it so you are never left wondering? This is what does.

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