Beauty InfinitiPRO 1 Vs 1.25 Vs 1.75 Inch: Best Barrel Size Winner
InfinitiPRO makes the same great curling iron in three barrel sizes. The size you pick decides your curl style. Here is how the three compare.
| Factor | INFINITIPRO by CONAIR Tourmali | INFINITIPRO by CONAIR Tourmali | INFINITIPRO by CONAIR Tourmali |
|---|---|---|---|
| Product | INFINITIPRO by CONAIR Tourmaline Ceramic Curling Iron, 1.25 Inch | INFINITIPRO by CONAIR Tourmaline Ceramic Curling Iron, 1 Inch | |
| Curl style | Loose curls, soft waves | Classic defined curls | Voluminous loose waves |
| Best hair length | Medium to long | Short to medium | Long |
| Heat settings | 5, up to 400F | 5, up to 400F | 5, up to 400F |
| Barrel | Tourmaline ceramic | Tourmaline ceramic | Tourmaline ceramic |
| Price | Check price | Check price | Check price |
| Auto shutoff | Yes | Yes | Yes |
Our Verdict
Choose the 1.25 inch for the most versatile tool. It makes both curls and waves on medium to long hair. Choose the 1 inch if you have short hair or want defined, classic curls. Choose the 1.75 inch if your hair is long and you want fast volume with soft waves. All three share tourmaline ceramic heat and five settings. Barrel size is the only decision that matters.
More Top Picks in This Category
Not sold on either of these two? Here are more bestselling options worth considering.
Best for: volume on long hair
INFINITIPRO by CONAIR Tourmaline Ceramic Curling Iron, 1.75 Inch
- 1.75 inch large barrel
- 5 heat settings up to 400F
- Fast voluminous waves
Pros
- Fastest styling of the three
- Big bouncy waves
- Great for long hair
Cons
- Too large for short hair
- Loose curls only
Want the Full Picture?
Choosing Barrel Size by Hair Length, Not Curl Type
The 1 vs 1.25 vs 1.75 inch comparison here is usually framed as tight curls versus loose waves, but hair length decides the outcome more than curl preference. The rule: the barrel must be small enough that the hair wraps at least one and a half times around it. On short hair above the shoulders, a 1.75 inch barrel cannot complete even one wrap, so it produces almost nothing; the 1 inch barrel is the functional choice. On medium hair, the 1.25 inch hits the sweet spot for defined waves. On long hair past the bra strap, the 1.75 inch creates the loose waves people want, while the 1 inch takes forever because each section needs multiple wraps.
The failure modes are specific. Too-large barrel on short hair: the hair slides off, no curl forms, and the user concludes the tool is bad. Too-small barrel on long hair: tight curls that take an hour to create and fall into waves anyway, wasting time for a result the bigger barrel gives directly. Matching barrel to length first, then choosing within the suitable sizes for the desired curl tightness, eliminates both failures.
For the in-between lengths, own the middle size. Shoulder-length to armpit-length hair works beautifully with 1.25 inches for almost every wave style, making it the most versatile single purchase. Buy the 1 inch or 1.75 inch as a second tool only when your length or style goals specifically demand it. Our curling irons buyer guide maps barrel sizes to hair types in more detail.
Matching Curler Form Factor to Your Hair Type
Curling irons, wands, automatic chambers, and air stylers each suit different hair, and the InfinitiPRO iron-versus-wand question inside this comparison is part of that bigger picture. The clamp iron suits beginners and precise curl placement; the clamp holds the ends while you roll, giving control. The wand suits experienced users wanting natural, clamp-free waves; the tapered shape creates varied curl sizes in one tool. Automatic rotating chambers suit those who struggle with manual wrapping but they jam on very long or thick hair. Air stylers suit damage-conscious users willing to trade some hold for gentler heat.
By hair type: fine, slippery hair holds better with a clamp iron, since the clamp anchors the section; wands let fine hair slide off before the heat sets. Coarse, resistant hair responds well to wands and higher heat, since the direct barrel contact transfers heat efficiently. Beginners with no technique should start with the clamp iron or an air styler, not a wand, because wand technique (wrapping without burning fingers) has the steepest learning curve.
The honest tradeoff nobody states: no single form factor is best, only best for a specific head of hair and skill level. Buying the form factor that suits your hair beats buying the one with the best reviews from people with different hair. The Conair double ceramic guide compares iron options within the clamp format.
The Second-Day Refresh Without Rewashing
Curls from any of these barrel sizes can survive to day two and three with the right refresh, and the refresh method differs from the original styling. The core technique: do not re-wet the hair. Lightly mist with a water-detangler mix only if the hair is frizzy, then re-wrap the flattened sections around the barrel for five seconds each at one heat level lower than the original styling. The lower heat revives the shape without re-cooking the hair.
The safety limit on refresh passes: two to three days of touch-ups is the reasonable maximum before the accumulated heat and product demand a wash. Signs you have hit the limit are hair that feels coated, curls that fall within an hour of refreshing, and a scalp that itches. Pushing past these signs just bakes buildup deeper. Dry shampoo at the roots on day two absorbs oil and adds the grit that helps refreshed curls hold.
The overnight protection that makes refreshing work: pineappling long hair (a loose high ponytail) or sleeping on a satin pillowcase reduces the flattening that necessitates heavy refreshing. Less damage overnight means less heat needed in the morning, which is the virtuous cycle that keeps hair healthy through a week of styled days. Our titanium vs ceramic guide discusses heat settings that minimize refresh damage.