What UK bra size is equal to an Australian bra size 22D?

You can find an international bra size conversion chart at www.figleaves.com

Click on "fitting room" and then "sizing charts."

In UK Bras, the band size is denoted by the underbust measurement in inches, rounded to the nearest even number. A 22D would be the equivalent of a UK 44D, and would fit an underbust of approximately 44 inches.