Convex Edge Scissors: What They Do Best
By SalonScissors editorial team Updated
A convex edge is ground with a rounded outer face down to a very fine edge; it’s the grind on most of our cutters. A bevelled edge meets at a flat angle instead.
How we chose: One pick per edge type from our range, chosen on maker specs, listings and price. We sell them and haven’t run cutting tests. Prices checked 15 October 2026.
What makes an edge convex?
Convex grind
The outer face curves down to a very fine edge. The inner face is hollowed, so the blades only touch where they cross.
Bevelled grind
The outer face is ground flat down to the edge. Joewell calls its flat single bevel easy to use.
Each grind is drawn as one blade cut across, enlarged. Makers explain their own: Kasho’s edge and Joewell’s blade guide.
Jaguar describes a convex edge as “curved outward” with “a very fine, pointed cutting angle.” Kasho pairs that convex outer face with a hollow-ground inner face, so the blades only touch where they cross; Kasho says that keeps cutting resistance to a minimum.
Convex, semi-convex, bevelled or serrated?
| Edge | What its makers say | Best for |
|---|---|---|
| Convex | “A very fine, pointed cutting angle” (Jaguar) | Slide, slice and point cutting |
| Semi-convex | Joewell’s Convex Shape keeps “soft, sharp cutting” and suits anyone | Mixed salon work |
| Flat bevel | Joewell’s standard blade: “easy to use” | Blunt lines and learning |
| Micro-serrated | Holds hair so it “does not slip away” (Jaguar) | Blunt cuts on wet hair, over-comb |
Joewell’s words come from its blade guide.
Does convex mean you can slide cut?
Not by itself: the blade line matters too. Joewell says its curved bamboo-leaf blade is “suitable for slide cuts and slicing”, while the straighter the blade, the more it holds hair still. Jaguar adds that a hollow grind is “particularly suitable for slice techniques”.
So for slide cutting, look for a convex edge and a model its maker builds for slicing. A micro-serrated edge is the wrong tool here: it’s designed to stop the hair moving.
Micro-serration
Tiny teeth along the edge grip the hair so it doesn’t slip as the blades close. They’re far smaller than a thinner’s teeth.
Sword blade
A raised ridge runs along the blade. Joewell says a sword shape delivers the power to the point of the blade.
How should a convex edge be sharpened?
By someone who knows convex. The curve is the edge, and a flat grind at the wrong angle changes it.
Book a sharpen as soon as the cut gets worse: Yasaka asks owners to resharpen promptly when sharpness drops. When you book, name the model and say it’s a convex edge. Our sharpening page explains how to ask: tell us the model and what’s changed.
Common questions
Are convex edge scissors better?
For slide, slice and point cutting, yes: they’re the finest and smoothest edge. For blunt lines on wet hair or scissor-over-comb, a micro-serrated edge grips better. Choose for the cut you do most.
Is semi-convex the same as convex?
Close. It sits between a full convex grind and a flat bevel. Joewell’s version, Convex Shape, keeps soft, sharp cutting and is meant to suit anyone.
Can apprentices use convex scissors?
Yes. The 5.5” Ichiro Ergo apprentice cutter has a convex slice edge, and its 6.0” option is micro-serrated if your course asks for that.
Do convex scissors need special care?
Clean and dry them like any scissor, store them closed in a case so the tips don’t knock, and use a sharpener who works on convex edges.
Next step
Matching an edge to each haircut? The scissors for each haircut guide does it cut by cut, or compare edges with blade shapes in scissor blades, explained.