Learning how to use press on nails correctly is the difference between a set that lasts two weeks and one that pops off by day two. The process is simple — but a few key steps make all the difference. Here's everything you need to know. STEP 1 Find Your Size Before anything else, size your nails. Lay each press-on over your natural nail dry — it should sit edge to edge without overlapping your skin. When between sizes, always go smaller. STEP 2 How to Apply Press On Nails: Pr