No.1 15.5mm x 8mm – designed to open and expand the nasal cavity, No.2 16.5mm x 9.5mm – designed to open and expand the nasal cavity, No.3 18.5mm x 10mm – designed to open and expand the nasal cavity, No.4 21mm x 11.5mm – designed to open and expand the nasal cavity, No.5 22.5mm x 13mm – designed to open and expand the nasal cavity, No.6 24.5mm x 13mm – designed to open and expand the nasal cavity, No.7 27.5mm x 16mm – designed to open and expand the nasal cavity