Billabong Junior Suits
Billabong Men’s Size Chart
Women’s Size Chart (these are US sizes – add 4 for UK e.g. 2US=4UK, 8US=12UK)
Quiksilver Suits (not all suits are made in all sizes)
Roxy Women’s Wetsuits (not all wetsuits are available in all sizes).
Note these are UK sizes.
Xcel have a very good sizing document you should refer to on their website. http://www.xcelwetsuits.com/page/help/fit-sizing