Simplify the following text for a Grade 11 native English-speaking person.
Original: Current Australian 5 - , 10 - and 20-cent coins are identical in size to the former Australian , New Zealand and British sixpenny , shilling and two shilling ( florin ) coins .
Simplified: Current Australian 5 - , 10 - and 20-cent coins are the same size as the old Australian , New Zealand and British sixpenny , shilling and two shilling ( florin ) coins .