Candle Wick Guide for Beginners: How to Choose the Right Wick for Every Candle

Candle Wick Guide for Beginners: How to Choose the Right Wick for Every Candle

Choosing the right wick is one of the most important steps in candle making. Even if you use high-quality wax, premium fragrance oil, and an attractive container, the candle may not burn properly if the wick is too small, too large, or unsuitable for the wax.

A correctly selected wick helps the candle burn evenly, create a proper melt pool, release fragrance effectively, and maintain a stable flame. The wrong wick can lead to tunnelling, soot, excessive heat, mushrooming, weak scent throw, or even unsafe burning.

For beginners, wick selection may feel confusing because there are many wick materials, sizes, and series available. However, once you understand the basic factors that influence wick performance, choosing the right option becomes much easier.

This complete guide explains candle wick types, sizing methods, testing procedures, common problems, and practical tips for creating safer and better-performing candles.

What Is a Candle Wick?

A candle wick is the component that carries melted wax upward toward the flame through capillary action.

When the wick is lit:

1. The flame melts the wax around the wick.

2. The liquid wax travels upward through the wick.

3. The wax vaporizes near the flame.

4. The vapor burns and keeps the candle lit.

The wick controls how much wax reaches the flame, which affects:

• Flame size

• Melt pool diameter

• Burn temperature

• Scent throw

• Burn time

• Soot production

• Overall candle safety

This is why wick selection is so important.

Why the Right Wick Matters

The correct wick helps your candle:

• Burn evenly

• Reach the proper melt pool

• Produce a stable flame

• Release fragrance effectively

• Avoid excessive soot

• Prevent overheating

• Reduce tunnelling

• Burn for the expected duration

• Maintain a clean appearance

A wick that works perfectly in one candle may perform poorly in another because wick performance depends on the complete formulation.

Factors That Affect Wick Selection

Several variables influence the type and size of wick needed.

1. Container Diameter

The inside diameter of the container is one of the most important factors.

A wider candle usually requires:

• A larger wick

• Multiple wicks

• A wick with stronger fuel delivery

Measure the container at its widest internal point.

Do not choose a wick based only on the amount of wax or container volume.

2. Wax Type

Different waxes have different melting points, densities, and viscosities.

Common waxes include:

• Soy Wax

• Paraffin Wax

• Beeswax

• Coconut Wax

• Palm Wax

• Gel Wax

• Wax Blends

A wick that performs well in paraffin may not perform the same way in soy wax.

3. Fragrance Load

Fragrance oil affects the viscosity and burning behaviour of wax.

A heavily fragranced candle may require a different wick than an unscented candle.

Too much fragrance can also cause:

• Weak flame

• Wick clogging

• Smoking

• Poor burn performance

• Oil separation

Always stay within the wax supplier’s recommended fragrance load.

4. Colorants and Additives

Dyes, pigments, mica, stearic acid, and other additives can influence wick performance.

Some additives may:

• Increase viscosity

• Reduce wax flow

• Clog the wick

• Change burn temperature

When you change the formula, retest the wick.

5. Candle Shape

The type of candle also matters.

Common candle formats include:

• Container Candles

• Pillar Candles

• Taper Candles

• Votive Candles

• Tea Lights

• Decorative Molded Candles

Each type may require a different wick style.

Main Types of Candle Wicks

Cotton Wicks

Cotton wicks are among the most widely used options in candle making.

They are commonly used in:

• Soy candles

• Paraffin candles

• Coconut wax candles

• Container candles

• Pillar candles

Benefits

• Easy to source

• Available in many sizes

• Suitable for many wax types

• Clean and consistent burning when properly selected

Paper-Core Wicks

Paper-core wicks contain a paper filament that provides extra rigidity.

They are commonly used in:

• Container candles

• Votive candles

• Paraffin wax candles

Benefits

• Good flame stability

• Stands upright easily

• Suitable for some higher-viscosity waxes

Zinc-Core Wicks

Zinc-core wicks contain a thin zinc filament that helps the wick remain upright.

They are often used in:

• Container candles

• Votives

• Paraffin blends

Benefits

• Strong structural support

• Easy to position

• Consistent shape during burning

They are less popular in natural candle ranges where customers prefer cotton or wooden wicks.

Wooden Wicks

Wooden wicks create a modern appearance and may produce a soft crackling sound.

They are commonly used in:

• Soy wax candles

• Coconut wax candles

• Luxury container candles

• Premium gift candles

Benefits

• Attractive appearance

• Unique burning experience

• Premium product appeal

Challenges

• Require careful sizing

• Need proper wax priming

• Can be sensitive to fragrance load

• May require booster wicks

Hemp Wicks

Hemp wicks are made from natural fibres and are often coated with wax.

They are used in:

• Natural candles

• Beeswax candles

• Eco-friendly candle collections

Benefits

• Natural positioning

• Good structural strength

• Suitable for selected wax types

Common Wick Series

Wick series vary between manufacturers, but some commonly used categories include:

CD Wicks

CD wicks are flat braided cotton wicks with a paper filament.

Often used for:

• Soy wax

• Vegetable waxes

• Container candles

They are known for a consistent flame and controlled curl.

ECO Wicks

ECO wicks are flat cotton wicks interwoven with paper threads.

Often used for:

• Soy candles

• Natural wax blends

• Container candles

They are popular among makers who want a stable, self-trimming style wick.

LX Wicks

LX wicks are flat braided cotton wicks designed for consistent burning.

Often used for:

• Paraffin candles

• Soy blends

• Container candles

• Pillar candles

HTP Wicks

HTP wicks are designed to curl slightly during burning, which can help reduce carbon buildup.

Often used for:

• Soy wax

• Paraffin wax

• Container candles

Wooden Wick Sizes

Wooden wicks are generally selected by:

• Width

• Thickness

• Single-ply or double-ply

• Booster or non-booster design

Because wooden wick performance varies greatly, testing is essential.

How to Measure Your Candle Container

Measure the internal diameter of your container from one inside edge to the opposite inside edge.

For example:

• 5 cm internal diameter

• 7 cm internal diameter

• 9 cm internal diameter

Use this measurement as the starting point when checking the wick supplier’s sizing chart.

The chart should be treated only as a starting recommendation, not a final answer.

Single Wick vs. Multiple Wicks

A single wick may be suitable for smaller containers.

Larger containers may require:

• Two wicks

• Three wicks

• Multiple smaller wicks instead of one oversized wick

Multiple wicks can help:

• Create a more even melt pool

• Reduce excessive flame height

• Improve burn consistency

• Prevent overheating in the centre

For double-wick candles, place both wicks evenly from the centre and sides.

Basic Wick Selection Process

Step 1: Identify the Wax

Know exactly which wax or wax blend you are using.

Step 2: Measure the Container

Measure the inside diameter, not the outside diameter.

Step 3: Check the Wick Supplier’s Chart

Choose a recommended wick size as your starting point.

Step 4: Prepare Three Test Candles

Use:

• One wick size smaller

• The recommended wick size

• One wick size larger

This allows easy comparison.

Step 5: Keep the Formula Identical

Use the same:

• Wax

• Fragrance load

• Dye

• Container

• Pour temperature

• Cure time

Only change the wick size.

Step 6: Conduct a Burn Test

Burn the candles for controlled periods and record the results.

How to Perform a Candle Burn Test

Before testing:

• Allow the candle to cure properly.

• Trim the wick to approximately 5–6 mm.

• Place the candle on a heat-resistant surface.

• Keep it away from drafts.

Burn the candle for around 3–4 hours per session, depending on the candle size.

Record:

• Flame height

• Melt pool width

• Melt pool depth

• Sooting

• Wick mushrooming

• Container temperature

• Fragrance throw

• Remaining wax on the sides

• Total burn time

Allow the candle to cool completely before the next test session.

What Does a Good Burn Look Like?

A properly wicked candle should generally have:

• A steady flame

• Minimal flickering

• Little or no visible soot

• A melt pool that gradually reaches the container edges

• Controlled melt pool depth

• No excessive smoke

• No dangerously hot container

• Good fragrance throw

• A centred wick

The full melt pool does not always need to form during the first short burn, especially with some natural waxes.

Signs the Wick Is Too Small

A wick may be too small if:

• The candle tunnels

• The flame is very weak

• The wick frequently goes out

• The melt pool stays narrow

• Fragrance throw is poor

• A thick wax wall remains around the container

• The wick becomes buried in wax

Try testing the next wick size up.

Signs the Wick Is Too Large

A wick may be too large if:

• The flame is very high

• The candle burns too quickly

• The container becomes excessively hot

• The melt pool becomes too deep

• Black soot appears

• The wick mushrooms heavily

• The candle produces smoke

• The fragrance smells burnt

Try testing the next wick size down.

What Is Wick Mushrooming?

Mushrooming occurs when carbon builds up at the top of the wick, creating a mushroom-like shape.

Possible causes include:

• Wick too large

• High fragrance load

• Long burn sessions

• Incompatible wick type

• Excess additives

Some mushrooming may occur naturally, but heavy buildup should be corrected.

What Is Candle Tunnelling?

Tunnelling happens when the candle burns only through the centre, leaving unused wax around the edges.

Possible causes include:

• Wick too small

• Candle extinguished too early

• Incorrect wick placement

• Container too wide for a single wick

• Poor wick compatibility

Proper burn testing helps prevent tunnelling.

Wick Selection for Different Wax Types

Soy Wax

Soy wax often needs a wick designed for vegetable waxes.

Popular starting options include:

• CD

• ECO

• HTP

• Selected wooden wicks

Soy candles require proper cure time before final testing.

Paraffin Wax

Paraffin generally provides good fuel flow and scent throw.

Common wick options include:

• LX

• Zinc-core

• Paper-core

• CD

Beeswax

Beeswax is dense and has a high melting point.

It may require:

• Square braided cotton wicks

• Hemp wicks

• Larger wick sizes than some softer waxes

Beeswax candles require careful testing because natural beeswax can vary between batches.

Coconut Wax

Coconut wax is soft and often used in blends.

Common options include:

• CD

• ECO

• Wooden wicks

• HTP

The exact wick depends heavily on the blend.

Wick Priming

Priming means coating the wick with wax before use.

Many commercial cotton wicks are sold pre-waxed.

For unprimed wicks:

1. Melt a small amount of wax.

2. Dip the wick into the wax.

3. Remove it carefully.

4. Straighten it.

5. Allow it to cool and harden.

Priming helps improve stiffness and initial lighting.

Wick Tabs and Wick Stickers

Wick tabs are small metal bases attached to the wick.

They help:

• Hold the wick upright

• Position the wick at the bottom

• Improve manufacturing consistency

Wick stickers or heat-resistant adhesive can secure the tab to the container.

Always ensure the wick is centred before pouring wax.

Common Wick Selection Mistakes

Avoid these beginner mistakes:

• Choosing a wick based only on container volume

• Skipping burn tests

• Changing multiple ingredients during testing

• Using the same wick for every wax

• Ignoring fragrance load

• Using decorative additives near the wick

• Selecting an oversized wick for stronger scent

• Failing to monitor container temperature

Safety Tips

Always follow safe candle-making practices:

• Conduct full burn testing before selling.

• Use heat-resistant candle containers.

• Keep the wick centred.

• Trim the wick before each burn.

• Do not overload fragrance.

• Keep dried flowers and flammable decorations away from the flame.

• Add warning labels to finished candles.

• Follow wax and wick supplier guidelines.

• Never leave a burning candle unattended.

Frequently Asked Questions

Which wick is best for soy wax?

CD, ECO, HTP, and selected wooden wicks are commonly tested with soy wax. The correct choice depends on the wax blend, container diameter, fragrance load, and additives.

How do I know what wick size to use?

Measure the internal diameter of your container and use the wick supplier’s chart as a starting point. Test one size below, the suggested size, and one size above.

Can I use one wick for every candle?

No. Different waxes, containers, fragrances, and additives can require different wick sizes or types.

Why does my wick keep going out?

The wick may be too small, clogged, improperly primed, or unable to draw enough fuel from the wax.

Why is my candle producing soot?

Common causes include an oversized wick, excessive fragrance, long burn sessions, poor airflow, or an untrimmed wick.

Are wooden wicks better than cotton wicks?

Neither is automatically better. Wooden wicks offer a premium appearance and unique experience, while cotton wicks are often easier to source, size, and test.

Should I trim the wick?

Yes. Trim most cotton wicks to approximately 5–6 mm before lighting. Follow the supplier’s recommendation for wooden wicks.

Final Thoughts

Choosing the correct candle wick requires testing, patience, and careful observation. There is no single wick that works perfectly for every candle because wax type, container diameter, fragrance load, colorants, and additives all affect burn performance.

Start with your wick supplier’s recommendation, prepare multiple test candles, and record every burn result. By adjusting one variable at a time, you can identify the wick that produces a stable flame, balanced melt pool, good fragrance throw, and safe container temperature.

Proper wick testing is one of the most valuable skills a candle maker can develop. It helps you create candles that burn cleanly, perform consistently, and provide customers with a safer and more enjoyable experience.