Barber Scissor Blades: Edge and Profile Explained
Quick answer
Barber scissor blades are described two ways: the edge and the profile. The edge is convex (curved, very sharp, slices), bevel (flat facet, grips hair) or micro-serrated (fine teeth that stop hair sliding). The profile is the blade's outline, such as a sword blade for scissor-over-comb. One shear has one of each.
Every barber shear has two blade features: the edge (convex, bevel or micro-serrated) and the profile (the outline, such as a sword blade). Read them separately. A shear can be a sword profile with a convex edge, and the parts guide shows where each one sits.
The four blade types at a glance
Scroll sideways to compare all columns.
| Blade | What it is | Best job | Watch for |
|---|---|---|---|
| Convex edge | Curved face running to a fine edge | Slice, point and slide cutting | Needs a convex sharpener |
| Bevel edge | Flat facet at a steeper angle | Blunt cutting, thick hair | Won’t slide cut |
| Micro-serrated | Fine teeth along one or both edges | Clipper-over-comb, dry hair, learning | Won’t slide cut |
| Sword profile | Back curves to the tip | Scissor-over-comb, long cutting line | Longer lengths to control |
Convex and bevel: edge geometry
A convex edge curves all the way to the cutting line, so it is very sharp and slices cleanly. A bevel edge has a distinct flat facet; it is less sharp to the touch but grips hair and takes knocks. Joewell’s blade reference describes flat single-bevel, convex and sword shapes side by side.
Most of the Japanese-brand cutters we stock list a convex edge. Read the three views below separately: edge cross-section, serration detail and blade profile.
Convex edge, 5.0″ to 7.0″
Mina Sakura II Hair Cutting Scissors
In stock: 5.0″, 5.5″, 6.0″, 6.5″, 7.0″
Flat bevel edge, 6.0″ and 7.0″
Mina Black Diamond Cutting Scissors
In stock: 6.0” Cutting Scissor, 7.0″
Micro-serrated: hair stays put
Fine serrations along the edge stop hair sliding forward as the blades close. That suits blunt lines, clipper-over-comb finishing and dry cutting. It rules out slide cutting, where the hair has to glide along the blade.
Colour and coating are a separate matter from the edge. The finish guide covers black, rainbow and gold shears.
Sword: the blade profile
A sword blade has a back that curves towards the tip, giving a long, even cutting line for scissor-over-comb. It is a profile, so it can carry a convex edge. Most sword cutters come in 6.0″ to 7.0″.
Cobalt sword, 6.0″ to 7.0″
Juntetsu Premium Series: Cobalt Sword Scissors
In stock: 6.0″, 6.5″, 7.0″
The sword blade buying guide compares the current models, and the sword shears collection lists them all.
Choose by the cut you do most
- Point and slide cutting, texture work: convex edge.
- Blunt lines, clipper-over-comb, learning: micro-serrated or bevel.
- Scissor-over-comb and long sections: sword profile, 6.5″ or 7.0″.
The convex vs bevel guide goes deeper on edge choice. Toothed blades are covered in the thinning and texturising guide. Note your blade type when you book a sharpen so the edge comes back the same.
If you want a convex edge, the convex-edge list compares cutters from entry to cobalt.
Questions
What is the difference between a convex and a bevel edge?
A convex edge curves all the way to a very fine edge, so it slices and point cuts cleanly. A bevel edge has a flat facet at a steeper angle, so it grips hair and holds up to blunt cutting. Convex needs a sharpener who knows the grind.
Are micro-serrated scissors good for barbers?
Yes for blunt cutting, clipper-over-comb finishing and dry hair, because the fine teeth stop hair sliding off the blade. They are poor for slide or slice cutting. Many apprentices start on one.
What is a sword blade scissor?
A sword blade is a profile: the back of the blade curves towards the tip like a sword. It gives a long, even cutting line for scissor-over-comb and can still carry a convex edge.
Which blade is best for a first barber scissor?
A convex-edge offset cutter in 5.5″ or 6.0″ covers most work. Pick micro-serrated if you do a lot of blunt cutting and want the hair to stay put while you learn.
Can any sharpener sharpen a convex edge?
No. Convex edges need a sharpener who works on Japanese convex grinds. A flat-grind machine can turn a convex edge into a bevel. Ask before you book.