Don't want to buy all the lengths but want to try them all?  This mixed length tray is perfect.  
Lash out lashes mixed length trays will be your new favorite go-to lashes. They are super black (not blue) and have a perfect natural sheen. They are super soft, never look plastic, and volume diameters are very easy to fan. Available in C or D curl, in volume & classic diameters. Super short and long lengths are available in "get those inners" (5-9mm)  "being extra" (16-18mm) and "being bougie" (19, 21, 23mm) Please lash responsibly! 
 
The 16 Rows of mixed lengths are 7, 8, 9, 9, 10, 10, 11, 11, 11, 12, 12, 12, 13, 13, 14, 14.
 
Classic ONLY (one extension to one NL)
.18 (for those super strong natural lashes!)
.15
Volume 
.10 (2-3 lash fans per/NL)
.07 (3-5 lash fans per NL)
.03 (MEGA-up to 15 lash fans per NL)