Choosing the right dog grooming blade can make the difference between a smooth, efficient groom and a finish that takes far longer than it should.

The clipper itself provides the power, but the blade controls the cutting length, how the coat feeds through the teeth and the type of finish you create. Two groomers can use the same clipper and achieve very different results simply by changing the blade. The blade is only one part of the setup. Our complete guide to dog grooming clippers explains how to choose the right machine for different coat types and salon needs.

In this guide, we explain how dog clipper blade sizes work, what common blade numbers mean, the difference between finish-cut and skip-tooth blades, when wide blades make sense and how attachment combs give you more length options.

You can also browse our full range of dog grooming blades and attachments, including standard A5 blades, wide blades, replacement blades and comb attachments.

What Do Dog Clipper Blade Numbers Mean?

Dog clipper blade numbers generally work in reverse:

The higher the blade number, the shorter the coat it leaves behind.

For example:

• A #30 blade cuts much shorter than a #10 blade.
• A #10 blade cuts shorter than a #7F blade.
• A #7F blade cuts shorter than a #5F blade.

This can feel confusing at first because most people expect a higher number to mean a longer cut.

The easiest way to compare blades is to check the stated cutting length in millimetres rather than relying on the blade number alone. Exact lengths can vary slightly between ranges and manufacturers, so always check the product specification before buying.

Dog Clipper Blade Size Chart

The table below gives a practical overview of common detachable dog grooming blade sizes.

These are nominal industry lengths, not a guarantee of the exact finished coat length.

The result can change depending on:

• Whether you clip with or against coat growth
• Coat texture and density
• How well the coat has been washed, dried and brushed
• The pressure and angle used
• Blade sharpness
• The individual blade range

A blade chart is a useful starting point, but coat preparation and technique still matter.

What is an A5 Dog Grooming Blade?

An A5 blade is a detachable blade format used on many professional dog grooming clippers.

The main advantage is flexibility. Instead of replacing the entire cutting head or changing clippers, you can remove one blade and fit another size within seconds.

A5 systems are popular in professional grooming because they allow one compatible clipper to handle several jobs, including:

• Close detail work
• Full-body clipping
• Longer body finishes
• Attachment-comb work

Although many professional clippers use the A5 fitting, always check the product description to confirm that the blade is compatible with your clipper model.

Your blade system also needs to suit the way you work. Our corded vs cordless dog clippers guide explains the differences between salon-based and portable clipper setups.

Standard A5 Blades vs Wide A5 Blades

Standard A5 blades are the everyday choice for general salon work. Wide blades use a broader cutting surface, allowing the groomer to cover more coat with each pass.

Wide blades can be particularly useful when working on larger dogs or completing repeated full-body clips in a busy salon.

They are not automatically better for every groom. A standard blade often gives more control around legs, curves and smaller body areas.

Browse the available dog grooming A5 wide blades to compare sizes and brands.

Finish-Cut vs Skip-Tooth Blades

Two blades with the same number can perform differently depending on the tooth pattern.

Finish-cut blades

Finish-cut blades are usually marked F or FC. They have an even tooth pattern and are designed to leave a smoother result.

Common examples include #7F, #5F, #4F and #3¾F.

Skip-tooth blades

Skip-tooth blades have wider spaces between some teeth. This can help feed coarse or dense coat into the blade, but the more open pattern requires careful handling around folds, armpits, groin areas, ears and other delicate skin.

For most routine salon body work, a finish-cut blade is the more straightforward option.

Choosing a Blade by Grooming Job

New groomers should first make sure they are using a suitable clipper and blade system. Our guide to the best dog grooming clippers for beginners explains the key features that make a clipper easier to control.

Paw pads and close areas

Close blades such as #10, #15 or #30 may be used for paw pads and detailed work, depending on the dog, the groomer and the required finish.

Sanitary trimming

A #10 blade is a common choice because it gives a close result without being as extreme as higher-number blades.

Full-body clipping

Common body blade choices include:

• #7F for a short practical finish
• #5F for a medium-short finish
• #4F for a longer body finish
• #3¾F for a fuller result on a well-prepared coat

Matted coats

Do not force a longer blade or attachment comb through tight matting. Severe matting should be handled by an experienced professional groomer, with veterinary advice where there are welfare or skin concerns.

Choosing Blades by Coat Type

Curly and wool coats

Finish-cut blades are useful for shorter styles, while attachment combs help retain more length. Proper washing, drying and straightening are essential.

Long and silky coats

Fine coats can show clipper marks easily, so sharp blades and controlled technique matter.

Thick and dense coats

Keep the blade clean, rotate blades before they become hot and consider a wide blade for suitable larger body areas.

Double coats

Double coats are not normally clipped as part of routine coat maintenance. Bathing, drying, and deshedding may be more appropriate unless clipping is required for medical, welfare, or individual grooming reasons.

Blade Numbers vs Attachment Combs

A blade cuts the coat directly. An attachment comb fits over a compatible blade and leaves more length behind.

Attachment combs are useful for:

• Longer body finishes
• Keeping more coat
• Creating an even length
• Expanding the range of cuts available from one clipper

Many systems fit over compatible #10, #15 or #30 blades, but the correct base blade depends on the manufacturer.

Browse dog grooming clipper attachments in standard and wide formats.

Common Attachment Comb Lengths

An attachment comb should glide through the coat. If it catches or drags, stop and reassess rather than forcing it through.

How to Maintain Dog Grooming Blades

After use:

1. Remove the blade according to the clipper instructions.
2. Brush away loose coat.
3. Clean or disinfect it with a suitable blade-care product.
4. Dry it thoroughly.
5. Apply clipper oil to the recommended points.
6. Store it somewhere clean and dry.

A blade may need sharpening, servicing or replacement if it pulls, cuts unevenly, overheats quickly or has damaged teeth.

If a clean, sharp blade still pulls or cuts unevenly, read our guide to common dog clipper problems to check whether the issue may be with the clipper, drive system or setup.

Choosing the Right Dog Grooming Blade

Before ordering, check:

• Does it fit your clipper?
• What cutting length does it leave?
• Is it finish-cut or skip-tooth?
• Is it standard width or wide?
• Is it suitable for the coat and body area?
• Will your attachment combs fit?

The right blade is the one that fits your clipper, suits the coat and produces the required finish safely and consistently.

Complete your professional grooming setup with our range of dog grooming clippers and trimmers, brushes and combs, dog grooming scissors, and professional dog shampoos and coat-care products.