How to Shape Acrylic Nails with a Diamond Shape 80/80 File
By 2GUYS NAIL | Published: 2026-10-24
Category: How-to Guides
Learn how to use a diamond shape 80/80 file to shape acrylic nails. Step-by-step guide with tips for smooth, precise results.
Quick answer
Use a diamond shape 80/80 file to shape acrylic nails by filing in one direction with light pressure, following the natural curve of the nail.
Why a diamond shape file works for acrylic
Acrylic is harder than natural nails, so it needs a file with consistent grit and a shape that gives you control. The diamond shape file has a pointed tip that lets you reach cuticle areas and refine the free edge without over-filing. The 80/80 grit (100-grit on each side) is coarse enough to remove bulk quickly but fine enough to leave a smooth surface, reducing the need for a separate buffer.
Common mistake: sawing back and forth
Many beginners file in a sawing motion, which creates heat and can lift the acrylic. Always file in one direction—from the side toward the center—to avoid friction and maintain the shape. The diamond shape file's edges naturally guide you to file at the correct angle.
Step-by-step: shaping acrylic nails with a diamond shape 80/80 file
- Step 1: Prepare the nail: Wipe the acrylic nail with alcohol to remove dust or oil. Hold the diamond shape file at a 45-degree angle to the free edge. Filing on a clean surface prevents slipping and uneven edges.
- Step 2: Shape the free edge: File from the side of the nail toward the center in one smooth stroke. Use the pointed tip to refine corners. Repeat on the other side to create a symmetrical almond or square shape. Check symmetry after every 3–4 strokes; over-filing one side is a common mistake.
- Step 3: Smooth the surface: Lightly buff the top of the acrylic using the flat side of the file. Use short, gentle strokes to remove ridges without thinning the acrylic. Stop as soon as the surface feels even—too much pressure can expose the natural nail.
Product used in this guide
- Premium Diamond Shape 80/80 File (50 pcs): Each pack contains 50 diamond-shaped files, each side finished with a consistent 100-grit surface for smooth, controlled filing. The consistent grit ensures even shaping without scratching the acrylic, and the bulk pack is practical for frequent use.
Premium Diamond Shape 80/80 File (50 pcs)
