You can compare the size, many of the cheapo imported ones just aren't the same size. The imported ones also seem un sturdy and "wiggle" a lot. New USGI come in a small brown paper wrapping that has instructions, if I remember correctly. New USGI P-38's are a little hard to open and will snap into the cutting position. The Brits. have a larger can opener that has a thumb rest and can slo be used as a spoon.