How to File Your Nails Into the Right Shape (Without Splitting Them)

Filing seems too basic to get wrong — and yet the see-saw motion most of us learned is exactly why nails peel and split. Five minutes of proper technique fixes it for good. Here's how to file your nails like a manicurist.

Rule #1: one direction only

Sawing back and forth heats and frays the keratin layers, opening the door to peeling. Instead, stroke from the outer edge toward the center, lift, repeat. It takes barely longer and your nail edge stays sealed.

Pick the right grit

• 100–150 grit — acrylics and gel extensions only; too harsh for natural nails
• 180 grit — shortening natural nails
• 240 grit — shaping and finishing the natural edge
• Glass files — gentle, washable, and they last for years; the best everyday choice

Choose the shape for your hands

1. Squoval — square with softened corners. The most break-resistant everyday shape; flatters almost everyone.
2. Oval — softly elongating, elegant on wider nail beds.
3. Almond — tapered and feminine, visually lengthens fingers. Needs a little nail length to work.
4. Round — the practical short-nail classic; follows the fingertip's own curve.
5. Square — sharp and graphic, best on long, narrow nail beds.

The 4-step filing routine

1. File dry, always. Wet nails are soft and tear instead of cutting cleanly — file before your bath, not after.
2. Set the length with strokes flat across the tip.
3. Shape the sides, holding the file at a slight angle under the edge, working toward the center. Check symmetry by looking at the nail head-on, not from above.
4. Seal the edge: one gentle downward swipe over the rim, then buff the surface lightly if you're polishing after.

The mistakes that cause splitting

• See-saw filing (the big one)
• Filing deep into the side walls — weakens the nail's support structure
• Using a worn-out emery board that crushes instead of cuts
• Shaping wet nails straight out of the shower

The takeaway

One direction, 240 grit, dry nails, and the shape that suits your hands. Boring advice, transformative results — your polish will apply better on a clean edge, too.

Keep reading: the complete nail shape guide and our best manicure tips.