Depending on the effect you want to give your hair, you will need to consider the size of your curling iron. Indeed, a fine curling iron (from 16 to 25 mm in diameter) will create tight curls unlike an iron with a thicker diameter (from 32 mm), which is very suitable for sporting wavy hair. Small diameter curling irons are suitable for short or even very short hair, because the curls will last longer and relax less quickly. The universal diameter irons (19 mm) are ideal for medium-length hair or hair that is difficult to curl. Long hair will go for irons 25 to 26 mm in diameter for a natural effect. You will also need to pay attention to the shape of your curling iron. A conical iron is ideal for forming soft and natural curls. You will also find curling iron models designed to suck up the strand of hair and then roll it up and heat it automatically. Other curling irons in the shape of straightening irons are currently available on the market.
Once you have settled on a curling iron diameter, you must ask yourself about the material of your curling iron. The material with which the iron is made is essential:the condition of your hair depends on it! Indeed, the curling iron, like the straightening iron, damages the hair. Especially if the use of these devices is daily. Curling irons made of ceramic, titanium, or tourmaline are best for your hair because it won't burn. Your hair will keep a silky and soft appearance. Ceramic curling irons really perform well, as the heat spreads evenly and immediately. Your hair therefore suffers less aggression.
One of the essential criteria is also the possibility of adjusting the temperature of your curling iron. Indeed, it is not essential to curl your hair entirely at high temperature. You can fine-tune your hairstyle by lowering the heat of the iron. In fact, it is preferable to choose an iron with adjustable temperature, as a general rule, the temperature is regulated between 160°C and 230°C. The heating time of your device is also interesting:the faster your iron heats up, even instantly, the better it will be for your hair.