Curl: The ‘curl’ describes how curly the lash extensions will be. J has the least curl, then B, C, D, and U is the curliest. We also have an L and L Plus Curl for deep set eyes with mono-lids.The most requested curls are C and D Curl. Please refer to our Curl Chart for comprehensive descriptions.
Thickness: The ‘thickness’ refers to how thick the actual eyelash extension's diameter is. Your customer's own natural eyelashes are typically 0.10mm and 0.15mm thickness. The thicker the lash the heavier and firmer it will be. BL extension lashes range in thickness from 0.03 all the way up to 0.25. The most requested thicknesses are: 0.15 and 0.20. Russian volume techniques utilize the thinnest lashes available (0.03, 0.05 & 0.07), as it is easier to apply multiple lash extensions to a single natural lash without adding extra stress to the natural lash.
Length: The length of the lash is always the number followed with ‘mm’ (millimeter). A length of single strand lashes range from the shortest at 5mm up to 20mm being the longest. The most requested lash lengths are 9mm through 12mm. Generally an eyelash extension application has a combination of 3-5 different sizes to create a natural look. Using extensions too long for your client's natural lash can result in short retention and damage in natural lashes.