Using thinning shears correctly – what they are for

August 23, 2026

Effilierschere mit beidseitig verzahnten Blättern zum Ausdünnen ohne Kürzen

Thinning scissors do not shorten – they thin out. That is the entire purpose of the instrument and at the same time the reason why they are so often used wrongly the first time. This guide explains what the teeth do, where in the hair to cut, and how to recognise a pair that suits what you have in mind.

What thinning scissors are meant for

With ordinary hair scissors, blade meets blade – the hair is cut through along the whole line. With thinning scissors, a smooth blade faces a toothed one. Hair slips through between the teeth; only the hair above the gaps is shortened.

The result: the length of the hair visibly remains, the volume decreases. That makes sense with

thick, heavy hair that does not fall but sits on top,
hard steps between two lengths that should run out more softly,
fringe and contour transitions,
beard and neckline, where a straight edge looks too hard.

They do not make sense with fine or thin hair, with frizzy hair that tends to stick out, and anywhere length is actually meant to come off. That is the job of ordinary hair scissors.

Toothed on one side or on both?

Toothed on one side (one smooth blade, one toothed): takes noticeably more hair per cut. The classic for really thinning thick hair. Also sold as modelling scissors.
Toothed on both sides (both blades toothed): takes less per cut and leaves a softer, less conspicuous transition. More forgiving if you have little practice.

The terms “thinning scissors” and “modelling scissors” are not used consistently in the trade. Do not rely on the name, but on two specifications: toothed on one or both sides and number of teeth.

The number of teeth decides how much comes off

The fewer and the wider the teeth, the more hair goes per cut. As a guide:

Few, wide teeth – strong removal. For very dense hair and coarse thinning. Mistakes are clearly visible here.
Medium toothing – the all-rounder for home use.
Many, fine teeth – little removal per cut. For transitions, contours and anything that should stay invisible.

Anyone buying only one pair is safer with medium to fine toothing: taking off too little can be corrected, taking off too much cannot.

Use: the three rules

Keep your distance from the roots. Never thin directly at the hairline. At least a hand's width away – otherwise the shortened hairs later stand up as fuzz.
Work in the lower third. Lift the strand, set the scissors at an angle and close them once in the lower part of the length. Then comb it out and look at the result before you cut again.
Close once, not several times in the same place. Two cuts in the same spot take off twice as much – which only becomes visible as it dries.

Two points that are often overlooked: thinning is usually done on dry hair, because wet hair hides more than it shows – otherwise the removal regularly turns out too strong. And the scissors are guided at an angle to the strand, not at a right angle; that gives a softer run-out.

How to recognise good thinning scissors

Cleanly worked teeth. Burrs or uneven gaps tug at the hair instead of cutting it – you feel that immediately.
Play-free action. The shanks must not wobble sideways. An adjustable screw is a good sign.
A finger rest. It relieves the little finger when you work for longer.
Stainless steel. A matter of course if the scissors meet moisture or disinfection – what the various terms mean is explained in Stainless, nickel-plated, stainless steel.

Important: toothed scissors cannot be resharpened

Thinning scissors rarely go blunt in the usual sense – they start to pull. Unlike a smooth pair of hair scissors, though, that is not a case for the sharpening service: resharpening would destroy the toothing. A worn pair of thinning or modelling scissors is replaced, not repaired.

That is the strongest argument for buying a cleanly made pair straight away – the price difference spreads over the entire service life, and here that life cannot be extended. This does not apply to smooth hair and nail scissors; when resharpening is worthwhile there is explained in Having nail scissors sharpened.

Left-handers will find the case for genuine left-handed scissors in Scissors for left-handers.