Yes, there are different types of curl, sizes and thickness to choose from.
1 - Curl Type- How curly the lash extension used will determine the look that you want.
BELOW ARE SOME OF THE MOST POPULAR CURL LETTER CODES AND HOW TO TELL THE DIFFERENCES IN EACH:
J-Curl: straight and very slight curl
B-Curl: slight curl
C-Curl: very natural curl and curls at one end
CC-Curl: very natural curl with strong curl
D-Curl: very strong curl and curls at both ends
L-Curl: straight base at one end and B or D Curl at the other end
2 - Thickness- How thick the lash extension used depends on the desired look and also how thick a client’s natural lash is when she comes in with. The selected lash extension can’t be too thick which it would weigh down the client’s natural lash and cause damage to the natural lash or make the lash extensions fall out too quickly.
Extensions come in a variety of thicknesses ranging from .05 mm - .20 mm, with the most popular being used for Volume Lashes and very thin natural lashes are .05 mm, .06 mm, .07 mm and .10 mm. For Classic lashes the most popular thickness used are.15mm and .20mm.
3 - Length - There are several lash lengths that are available to choose from to create a specific look. Popular extensions come in lengths ranging from 7mm to 15mm long.