Small/Medium  - 55mm x 16mm (fits 75% of adult noses) Help by giving you the answer to nasal congestion whilst sleeping or exercising Two flexible spring type bands gently open your nasal passages allowing you to breathe more freely and reduce snoring Increases air flow up to 31% Relieves congestion caused by colds，  sinus problems and allergies and allow a peaceful nights sleep for everyone Place strip in the correct position on a clean， dry nose according to the instructions on each sealed packet