Knowing how to identify quality candles comes down to a handful of checks you can make before you ever strike a match. Look at the wax, the wick, the label and the jar. Most of what separates a good candle from a disappointing one is visible from the outside, and the rest shows up in the first burn.
We sell soy candles and paraffin candles, and we are not going to tell you one is good and the other is bad. A well-made candle in either wax will serve you well. A poorly made one will not, whatever the label says. So this guide is about the details that actually decide it.
Start with the label
A good label tells you four things: the wax, the weight, the wick and roughly how long the candle burns. If any of those are missing, it is worth asking why. A maker who has paired the wick to the wax carefully usually wants you to know about it.
Weight matters more than the size of the jar. A thick-walled jar can look generous and hold surprisingly little wax. Check the grams. Our Windermere Botanical Soy Candle (£26.95), for example, states 380g of soy wax, a cotton wick and around 45 hours of burning. That is the kind of information you should expect to find.
Burn time is always an estimate. It assumes sensible burning, which we come to below.
Look at the wax
The surface should be level and even. Small imperfections are normal. Soy wax in particular can show a faint frosting or a slightly uneven top, and that is simply how the wax sets.
What you do not want is wax pulling away from the glass in large patches, deep cracks, or a wick sitting well off centre. An off-centre wick will melt one side of the candle faster than the other, and no amount of careful burning will fully correct it.
As for which wax, each has its own character. Soy is plant-based and tends to burn slowly and softly. Paraffin holds colour well and gives a clear, steady flame. We have written about the trade-offs in more detail in Soy Wax vs Paraffin Candles: What Actually Matters. The short version is that how a candle is made and burned matters more than which wax it uses.
Check the wick
The wick should stand upright, sit in the centre and be firmly anchored to the base. Look down into the jar. If it leans or wobbles, it will lean further once the wax around it melts.
Cotton wicks give a quiet, steady flame. Wooden wicks are flatter and wider, and they crackle softly as they burn. Our Ash & Woodsmoke Wooden Wick Soy Candle (£14.95) uses one, and the sound is a large part of its appeal. Neither type is better. They are simply different.
What matters is that the wick suits the width of the jar. Too thin, and it struggles to melt the wax right to the edge. Too thick, and the flame runs tall and can smoke. You will see which you have within the first hour of burning.
Judge the fragrance fairly
A candle that smells very strong in the shop is not necessarily the better candle. Cold scent, the smell of the unlit wax, and hot scent, the smell once it is burning, are two different things. Some candles are gentle in the jar and fill a room once lit. Others are the reverse.
A good scented candle should smell much the same at the end as it did at the start. If you can, choose a fragrance that suits the room rather than the loudest one on the shelf. Fresh, mineral scents such as our Seasalt & Moss Botanical Soy Candle (£26.95) tend to sit well in bathrooms and open-plan rooms, where a heavy scent can feel too much.
Unscented candles deserve a mention too. If you want light without fragrance, or want to burn one alongside a scented candle, an unscented one is the sensible choice. Our Amber Mosaic Glass Candle – Medium (£16.95) is unscented paraffin, with around 45 hours of burning.
The first burn tells you most
Even a well-made candle can be spoilt in its first evening. Wax has a kind of memory. Whatever melt pool forms the first time is roughly the one it will return to afterwards.
So on the first burn, let the wax melt all the way to the edge of the jar before you blow it out. In most jars that takes two to three hours. If you put it out after half an hour, the candle starts burning a tunnel down the middle, leaving a ring of wax on the sides that it will never reach.
If a candle tunnels after a proper first burn, that tells you something about the wick. If it melts evenly to the edge, the maker has paired wick and wax well. This is the single most useful test of quality, and it costs you nothing but an evening.
Burn habits that keep any candle at its best
Good candles reward a little care. These habits make more difference than the wax ever will.
- Trim the wick to about 5mm before every lighting. A long wick gives a tall, flickering flame and can leave soot on the glass.
- Keep it out of draughts. Open windows, doorways and fans pull the flame to one side, which causes uneven melting and smoke.
- Stop after about four hours. Let the candle cool fully before relighting.
- Stop with about 1cm of wax left. The glass can get too hot once the wax is nearly gone.
A candle that smokes or blackens its jar is often a candle with an untrimmed wick in a draught, rather than a badly made one. It is worth ruling those out before blaming the candle.
Safety, plainly
Never leave a lit candle unattended, even briefly. Put it on a heat-resistant surface, away from curtains, shelves above and anything that could catch. Keep it out of reach of children and pets. Blow it out before you leave the room or go to bed.
Putting it together
A quality candle has a clear label, a level surface, a centred and upright wick, and a fragrance that holds steady from start to finish. Then it melts evenly to the edge on its first burn. Everything after that is down to how it is looked after.
If you would like to see the range with all of this in mind, you will find it in our candles collection.