Survival-One coveralls are available in a range of standard sizes, as described in the table opposite. A ‘made-to-measure’ alteration service is also available, dependant on the product and application. Customer specific size rolls may be accommodated when appropriate. The waterproof main entry slide fastener, neck seal, wrist seals, socks, and donning zippers are sized in accordance with the size chart. The fit of the garment is a function of the body size measurement model and the ease allowance.