the length of time ralley depends on how you take care of it ive put baby oil on some and only gently cleaned the area and had them last over a week it also depends on the strength of the henna mixture the tint and how it was appliedI wear em all the time? you can buy the past dye you ad whatever it calls for then mix it up and apply they sell stencils and stuff but I have never been successful with them I think they look particularly cute with summery skin baring outfits Ive been putting them around my upper armit take some time but its so cute when they're done google henna supplies and ideas you'll find a ton of stufftraditionally they are worn for manny different occasions