@Brandie We have used lash extensions on most of our brides when making them up for their wedding day. There are many different types of lashes you could get --clusters, individuals, flares and strips-- and some are more subtle and sparse like 'butterfly' lashes in outer corner of eyelid and some are more thick and dramatic. You can trim them of course as well. We highly recommend using lash extensions on your wedding day as it helps your eyes 'pop' more in photos. One thing you can do, if you're not used to lash extensions and have never used them before is you can try them out during the "trial" and decide if you like them or not before your big day. They can be safely removed if they don't suit you. But if they do, regarding how long they last, that depends on the type of lash extension you get and how careful you are with them (i.e. not rubbing your eyes, using oil-based products or washing your face too often...all which causes the adhesive to wear off more quickly) Typically a set should last 6 to 8 weeks. Hope this helps! Happy wedding planning!