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The Ultimate Guide to Semi-Cured Gel Nail Strip Sizing
With La-Bek Size Chart + Stretch Tips!
Choosing the right size semi-cured gel strip can make all the difference. A perfect fit means better adhesion, longer wear, and that smooth, “did-you-just-go-to-the-salon?” finish we all love.
Whether you’re brand new to semi-cured gels or still perfecting your technique, this guide will help you pick your sizes confidently — including exact strip measurements, our French tip proportions, and how to use the gentle stretch function for a tailor-made fit.
Let’s get into it!
Why Nail Strip Size Matters
A strip that’s even slightly too wide or too narrow can lead to:
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Lifting at the sidewalls
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Hair catching at the edges
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Shorter wear time
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A less seamless finish
Your ideal size will fit edge-to-edge on the nail without touching the skin or cuticle.
That’s where our 20-strip layout comes in, a full range of sizes designed to suit every nail shape.
How to Choose the Perfect Size
1. Pick slightly smaller, not bigger
If you’re between two sizes, choose the smaller one.
A strip that touches skin or cuticle will lift.
2. Use stretching to fine-tune the fit
La-Bek strips are made from a premium, flexible gel that can gently stretch to:
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Narrow the strip → stretch vertically (top to bottom)
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Widen the strip → stretch horizontally (side to side)
This helps you get a custom fit, even if your nails are in-between sizes.
Stretching demo video:
How to stretch semi-cured gel nails
How to stretch french tip semi-cured gel nails
3. Test before removing backing film
Hold the strip up to your nail before peeling it off the backing.
If the curve and width match your nail bed, you’re good to go!
How Long Should the Strip Be?
Semi-cured gels are not extensions, they’re designed to be trimmed and filed to your natural nail length.
For the best results:
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Place strip on nail
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Fold excess over tip
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File in a downward motion
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Cure once
This gives you a salon-smooth free edge that stays sealed for days (and days… and days 😉).
What If None of the Sizes Fit Perfectly?
Good news: they will!
Here’s what to do:
Too narrow?
→ Stretch horizontally for the perfect width.
Too wide?
→ Size down, then stretch vertically to narrow the strip.
Nail beds are all different shapes?
→ Most people use 7–9 sizes across all 10 fingers.
This is normal and expected!
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Common Sizing Mistakes (and How to Avoid Them)
❌ Mistake 1: Choosing a strip that slightly overlaps the skin
✔️ Always choose the smaller size.
❌ Mistake 2: Filing side-to-side
✔️ Only file straight down.
❌ Mistake 3: Expecting the strips to extend the nail
✔️ Trim to your own nail length for best bonding.
❌ Mistake 4: Not stretching when needed
✔️ Stretching is your best friend for a perfect seal.