Woof

Dog clipper blade chart.

What each A5 blade leaves, in inches and millimeters, and why snap-on comb numbers don’t carry over between brands.

A5 blade lengths

Andis, Oster, and Heiniger publish the same lengths for these A5 blades.

What each A5 blade leaves: Andis, Oster, and Heiniger
BladeInchesmm
#401/100″0.25
#301/50″0.5
#153/64″1.2
#101/16″1.5
#7F1/8″3.2
#5F1/4″6.3
#4F3/8″9.5
  • Skip-tooth and finish blades of the same number leave the same length: 7 and 7F, 5 and 5F, 4 and 4F. Andis writes FC.
  • Not Wahl. Wahl’s Competition blades list their own lengths.

Sources

Snap-on comb numbers aren’t a standard.

The same number can be a different length on another brand’s set. A #5 comb, for example:

What a #5 snap-on comb leaves, by set
Set#5 leaves
Wahl US stainless set (3390-100)1/8″
Andis Universal small set, 9 pieces (12860)3/16″ (5 mm)
Wahl UK competition stainless combs, which number upward (#1 = 3 mm … #8 = 25 mm)16 mm

So go by the length printed on your own comb, not the number.

Sources

Andis Universal snap-on comb sizes

Andis’s small and large Universal sets, longest first. These are Andis’s lengths; other sets number differently.

Andis Universal snap-on combs, small and large sets
CombInchesmm
#F1 1/4″32
#E1″25
#D15/16″24
#C7/8″22
#B13/16″21
#A3/4″19
#1/411/16″17
#05/8″16
#1/29/16″14
#11/2″13
#1 1/27/16″11
#23/8″10
#35/16″8
#41/4″6
#53/16″5
#61/8″3
#71/16″1.5

Sources

In Japan, combs are sold in millimeters.

Japanese suppliers list attachment combs by length, and title A5 blades with the number and the millimeters, such as “7F 3.2mm”. Heiniger’s 9-piece set:

Heiniger attachment combs, 9-piece set
Comb length (mm)
3610131619222532

Sources

Woof keeps the comb and blade you used on every dog, in inches or millimeters, so the next groom starts from the last cut. About Woof

Figures as each maker or supplier publishes them, checked October 2026. Woof isn’t affiliated with Andis, Oster, Heiniger, or Wahl.