Are all of the eyelash extensions the same, or do they came in a different colors, lengths and thickness?

There are coloured lashes in both purple and green that are interspersed with black lashes.
There is a variety of synthetic eyelash extensions in lengths ranging from 7mm – 15mm. There are also various degrees of synthetic eyelash thickness including .20mm .25mm and .30mm thick lashes. When your professional applies the lashes, they will use a careful mixture of lengths and thicknesses for a glamourous and stunning look.