All of Avon Protection's masks are available in three sizes. This sizing tool is available to assist in initial selection of the correct mask size. It does no more than assist initial selection. Only a successful completion of a quantitative fit test can determine correct fit.
It is a requirement that the initial sizing and fitting be performed by trained personnel.
If the mask is too small, the operator may lose seal performance and protection. The mask will be uncomfortable to wear and could affect field of view.
If the mask is too large the operator may lose seal performance and protection. The operator will also experience a very loose fit with subsequent mask slippage.