Editing Wetsuit (section)

===Sizing and fit===
Wetsuits that fit too tightly can cause difficulty breathing or even [[Heart failure|acute cardiac failure]],<ref name=Williams2003/> and a loose fit allows considerable flushing which reduces effectiveness of insulation, so a proper fit is important. The quality of fit is most important for diving as this is where the thickest suits are used and the heat loss is potentially greatest. A diving wetsuit should touch the skin over as much of the body that it covers as comfortably possible, both when the wearer is relaxed and when exercising. This is difficult to achieve and the details of style and cut can affect the quality of fit. Gaps where the suit does not touch the skin will vary in volume as the diver moves and this is a major cause of flushing.

Wetsuits are made in several standard adult sizes and for children. Custom fitted suits are produced by many manufacturers to provide a better fit for people for whom a well fitting off-the shelf suit is not available.