Many Companies are saying that their kits will do up to 50 clients or so.  That depends on how many lashes the client wants per eye. When you go to check what is in their individual eyelash extensions courses kits, they don’t tell you!  So its best to check, as it could appear misleading.  Your glue will last quite a while anyway as very little is used, most are 5 gram or 10 gram.  Eyelashes also go a long way, and there are usually up to 16-18000 on most trays, as ours do. It depends how many lashes per client you use.  Their kits will have one tray in our large kit has 2 trays in so 3200 lashes!  With our different levels of kit you still get the tray of lashes with 16 rows.  We have our own lashes manufactured.  You choose what size kit from our excellent value kit packs..