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Size and design characteristics of masks.
| Length (cm) | Width (cm) | Type | Features | |
|---|---|---|---|---|
| Sample A | 9.5 | 17.5 | Pleated | Bendable wire |
| Sample B | 8.5 | 17.5 | Pleated | Bendable wire Adjustable ear strings |
| Sample C | 17 | 19 | 3D | / |
| Sample D | 14.5 | 17.5 | 3D | Changeable filter |
| Sample E | 14 | 23.5 | 3D | Changeable filter, Nose pad |
| Sample F | 9 | 17.5 | Pleated | 2 Bendable wires |
| Sample G | 14 | 20.5 | 3D | Changeable filter |
