Currency in Canada is, like in many countries, divided into paper money and coin.

Paper Money

Canadian paper money (or bills) are all the same dimention (15cm X 7cm). The most common bills used in Canada are:

The 5 Dollar Bill (blue)
The 10 Dollar Bill (purple)
The 20 Dollar Bill (green)
The 50 Dollar Bill (orange-red)
The 100 Dollar Bill (brown)

There are many ways to tell a true bill from a counterfeit one, including:

Green watermarks
Holograms
Small text that reads "Bank of Canada/Banque du Canada"Wavy lines made up of the denomination of the bill

The one exception to some of these are older bills that are still in circulation. You may also encounter 1 or 2 dollar bills, but they are largely out of circulation.

Coin

Canadian coins are all different sizes and are made from varying alloys of metals. In diminishing value they are:

The Two Dollar Coin (or Twoney) Aluminum with Zinc aloy center.
The One DOllar Coin (or Looney) Zinc aloy.
The 25 Cent Piece (or Quarter) Nickel aloy.
The 10 Cent Piece (or Dime) Nickel aloy.
The 5 Cent Piece (or Nickel) Nickle aloy.
The 1 Cent Piece (or Penny) Copper aloy.

All of the coins feature a British Monarch on the head side (usually Elizabeth II) but the tail sides can vary depending upon the year.