Long wide square-tipped acrylic nails are painted with semi-opaque nail polish. Then they are enhanced with silver nail art crystals. It's an easy design because the shiny crystals are applied randomly to half of the nails; the nail bed is free of the crystals.

It's a pretty basic nail style with some flashy sparkle fitting for the festive prom experience. If very long nails like this look too extreme for you, then you could still have the same design on shorter nails.