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To judge the ideal size of your mask, measure from above your upper lip (below the nose) to the back of the head at the neck area, circling around.

For the VEKTA Soundproof Mask:
- If it is 53cm or less: S/M is be the suitable choice.
- If it is 54cm or more: L/XL is be the recommended size.
For the OMBRA Soundproof Mask:
- If it is 53cm or less: S/M is the suitable choice.
- If it is 54cm or more: M/L is the recommended size.
If you are unsure and around the limit, we recommend the smaller size (S/M) as the safest choice! This advice is for both masks. The mask being a bit smaller is always fine, while a bit too large makes harder to have a tight sealing.