I needed to replace my very old similar fireman style boots which had tore due to age.  I researched the options at Amazon and found these got good reviews, and for a reasonable price.  I mainly use them when pressure washing the deck.  They are a little large for size 13 but I don't want to have to send back and not sure how a 12 would fit.  I will wear extra thick socks to make them a bit better fit.