All wetsuit products have a size chart that goes by height and weight. Scroll to the bottom of each product page to find this chart.
Simply find the corresponding box in the chart to find your recommended size. If you find you are between sizes, size down if you want a tighter, performance fit, and size up if you want a more relaxed fit. The suit should feel tight, but if it constricts your breathing or restricts shoulder movement in the water, you'll need to size up.