"This jacket is big."

Translation: Jaket ini besar.

[OliverEastwood]

When asked to translate "The black jacket", I said "Jaket hitam itu". Apparently I should have said "Mantel" instead of "jaket", so when the question was "This jacket is big", I wrote "Mantel ini besar", which was corrected to "Jaket ini besar". Din't think there was a right or wrong but apparently there is. Could someone explain if there is a difference?

[1CN5ijzC]

From my understanding, "mantel" it the big one like the american mafia in film use, as for "jaket", it's the same as the English "Jacket"