Will a #9 blade fit my clipper?

#9 detachable blades follow the A5 standard, so they interchange across A5-style clippers from Andis, Oster, Wahl (KM series), and Heiniger. They do not fit 5-in-1 adjustable-blade clippers (like the Wahl Bravura) or screw-on home clippers — those use their own blade systems.

Clipper blades Checked against maker charts

The #9 clipper blade

A #9 blade leaves about 5/64" (2 mm) of coat.

Cut length

5/64"(2 mm)

Type

Finish cut (F/FC) — even, smooth result

What the #9 is used for

A short working clip that isn't yet 'skin-short'
Wahl's own guidance starts close work at #9/#10 before moving shorter

Which clippers it fits

#9 detachable blades use the A5 standard — they interchange across Andis, Oster, Wahl KM-series, and Heiniger A5-style clippers regardless of which brand made the blade. They do not fit 5-in-1 adjustable clippers (Wahl Bravura/Arco) or screw-on home clippers, which take their own blade systems.

Leaves more coat

#8½ 7/64"

Cuts closer

#10 1/16"

All blade sizes

3/4HT 5/8HT #3F / #3¾ #4F #5F #6FC #7F #7 skip-tooth #8½#9#10 #15 #30 #50 #40

FAQ

How much hair does a #9 blade leave?: A #9 blade leaves about 5/64" (2 mm) of coat.
Will a #9 blade fit my clipper?: #9 detachable blades follow the A5 standard, so they interchange across A5-style clippers from Andis, Oster, Wahl (KM series), and Heiniger. They do not fit 5-in-1 adjustable-blade clippers (like the Wahl Bravura) or screw-on home clippers — those use their own blade systems.

Sources