When doing Classic Eyelash Extensions sets all lash technicians have a preferred set of lengths they like to use.
NEVER use 1 length for a whole full set. It will not look good and is not functional. The inner corners of the eye will scratch the eye lid and the outer corner lashes ill fall off too soon.
Premium Lashes recommends using 7mm-9mm on the inner corners and 10mm- 12mm on the outer corners if creating a Cats eye look. Depending on the curl J curl, C curl, D curl or B curl. This is just a suggestion and required for everyday wear.
Where clients want a special occasion set Lash technician may use lengths up to 13mm.
Please consult with your client to see what they prefer and what they want lash extensions for, a special occasion or everyday wear.