Learning to file and shape your nails properly is the foundation of every manicure. The right shape flatters your hands and resists breaking. The right technique leaves a smooth, sealed edge instead of a frayed one that peels and catches.
Choose a shape
| Shape | Description | Good for |
|---|---|---|
| Round | Follows the curve of the fingertip | Short nails; active hands; least likely to break |
| Square | Flat tip, straight sides, sharp corners | Wide nail beds; a modern look; corners can catch |
| Squoval | Flat tip with softly rounded corners | Almost everyone; strong and practical |
| Oval | Rounded tip, slightly tapered sides | Makes fingers look longer |
| Almond | Tapered sides, softly pointed tip | Longer, stronger nails |
| Coffin or ballerina | Tapered sides with a flat tip | Long nails or extensions |
| Stiletto | Sharp point | Extensions; fragile on natural nails |
A simple guide is to mirror the shape of your cuticle line. A curved cuticle suits round or oval nails. A flatter one suits square or squoval. The Nail Shape Finder suggests a shape from your nail length and lifestyle.
Choose the right file
- Fine grit (180 to 240) for shaping natural nails.
- Coarser grits (100 to 150) only for artificial nails or for taking down length quickly on thick toenails.
- Glass or crystal files have a fine, even surface, seal the edge well and can be washed.
- Emery boards are inexpensive and gentle, and should be replaced often.
- Metal files are often too harsh for natural nails.
Nail Files and Buffers: How to Choose the Right Grit explains grits and buffers.
Before you file
- Nails should be dry. Wet nails are soft and tear.
- Remove polish, so that you can see the true shape.
- If nails are long, clip first to just above the length you want. Clip in two or three small cuts across the nail, not one big one, to avoid cracking. See Nail Clippers vs Scissors: Which Tool Fits Your Needs?.
How to file
- Hold the file at a slight angle under the edge of the nail, about 45 degrees.
- Start at one outer corner and file towards the center in one smooth stroke.
- Lift the file and return to the start. Avoid a fast back-and-forth sawing motion, which heats and frays the layers of the nail.
- Repeat from the other corner towards the center.
- Finish with a few light strokes across the tip to refine the shape.
- Hold the file vertically and run it once downward over the edge to remove any roughness.
With a fine glass file, gentle strokes in both directions are less risky, but a light touch is still best.
Shaping each style
- Round: file the sides straight for a short distance, then curve the tip to follow the fingertip.
- Square: file straight across the tip, then straighten the sides. Soften the corners with one stroke each to stop snagging.
- Squoval: make a square, then round the corners.
- Oval: file from each side towards the center at a gentle angle, keeping the two sides even.
- Almond: file each side at a steeper angle towards the center, then soften the point.
Check your work
- Turn your hand around and look at the nails from the fingertip side. The shape should be even on both sides.
- Compare both hands.
- Keep all ten nails at a similar length. One much longer nail tends to break.
Do not file the sides too deeply
Filing into the corners where the nail meets the skin weakens the nail and can lead to breaks and ingrown edges. Leave the side walls straight for at least a millimeter or two.
Buffing
A light buff smooths the surface and adds shine. Use a fine buffer, a few strokes per nail, no more than once or twice a month. Over-buffing thins the nail plate.
After filing
Wash your hands to remove dust, then apply cuticle oil or hand cream. If you are about to polish, wipe the nails clean first. See How to Do a Manicure at Home.
If your nails keep splitting
Peeling or splitting at the tips often comes from sawing with a coarse file, filing wet nails, or dryness. Keep nails shorter, choose a round or squoval shape, file gently and moisturize daily. Brittle Nails: Causes and Everyday Care Tips covers brittle nails.
Related on ArniSun
- Nail Files and Buffers: How to Choose the Right Grit
- How to Do a Manicure at Home
- Brittle Nails: Causes and Everyday Care Tips
- Nail Shape Finder: Choose Your Nail Shape
- Nail Clippers vs Scissors: Which Tool Fits Your Needs?
Sources and further reading
Frequently asked questions
Is it bad to file nails back and forth?
A fast sawing motion with a coarse file can fray the nail and cause peeling. Filing in one direction with a fine file gives a smoother, stronger edge.
Which nail shape is the strongest?
Round and squoval shapes are the least likely to break, because they have no sharp corners or thin points.
How often should I file my nails?
About once a week keeps the shape and removes small snags before they become breaks.