Swim Caps · Roundup
Best Kids' Swim Caps (2026)
Sizing is the whole problem with kids' caps. Here is how to get it right.
The short answer
For school-age children the Speedo Junior Silicone Cap is the pick — genuinely junior-sized rather than a small adult cap. For a preschooler whose junior cap keeps sliding off, the TYR Kids' Silicone Cap runs smaller and stays on.
Photos on this page are licensed images that illustrate the category. They are not photographs of the specific products named, and no product image here is supplied by a manufacturer or retailer.
| # | Product | Best for | Age range | Price |
|---|---|---|---|---|
| 1 |  Top pick Speedo Junior Silicone Cap A properly sized junior silicone cap, which is the difference between a cap a child wears and one that rolls off. | Ages 6-14 | Silicone | |
| 2 | Budget pick TYR Kids' Silicone Cap Runs smaller than most junior caps, which is what a four- or five-year-old actually needs. | Small heads, ages 4-10 | Silicone | |
| 3 |  Also good Speedo Lycra Swim Cap The most comfortable cap you can buy and the least waterproof — a hair-keeper, not a water-blocker. | Comfort, not dryness | Lycra / polyester blend | |
| 4 | Upgrade pick TYR Long Hair Wrinkle-Free Silicone Cap An asymmetric cap with extra volume at the back, which is the only design that takes a bun without squeezing. | Braids, buns, thick hair | Silicone | |
| 5 | Also good Speedo Silicone Long Hair Cap Extra interior room in a conventional shape — less specialized than the TYR, and easier to get on right. | Long hair, everyday swimming | Silicone |
The size range hidden inside the word 'junior'
A junior swim cap is meant to cover ages roughly six to fourteen, which is a head-circumference span of several inches. A cap that fits a twelve-year-old comfortably will ride up off a five-year-old within two lengths, and the child will take it off and leave it on the side.
So measure. Head circumference, soft tape, above the ears and across the middle of the forehead. Roughly 19 to 21 inches is junior territory; below that you want a cap sold specifically for small children, and TYR's kids' silicone runs noticeably smaller than Speedo's junior.
Never buy latex for a child. It is cheaper, and it pulls hair every time it goes on or comes off. One painful removal is usually all it takes for a child to refuse caps entirely, and that is an expensive lesson for the sake of a small saving.
Speedo Junior Silicone Cap
A properly sized junior silicone cap, which is the difference between a cap a child wears and one that rolls off.
Specifications
- Material
- Silicone
- Age range
- 6-14 years
- Head size
- Junior, approx. 19-21 in
- Fit
- Standard dome
What works
- Sized for a child's head rather than being an adult cap in a smaller box
- Silicone does not pull hair on the way off, which is why children abandon latex
- Thick enough to survive being stuffed in a wet bag
- Cheap enough to own two so one is always dry
What doesn’t
- No extra volume, so it crushes long hair
- Plain shape offers no help getting it on — a parent still does it for younger kids
Who it’s for
A school-age child in lessons or on a summer team with short to medium hair.
Bottom line
The kids' default. For a child with long hair, buy a long-hair cap instead and skip the tears.
TYR Kids' Silicone Cap
Runs smaller than most junior caps, which is what a four- or five-year-old actually needs.
Specifications
- Material
- Silicone
- Age range
- 4-10 years
- Head size
- Small junior
- Fit
- Snug dome
What works
- Genuinely small — it stays on a preschooler's head instead of riding up
- Smooth silicone interior, so it goes on without a fight
- Bright colors make a small swimmer easy to spot in open water
- Chlorine-resistant across a full season of lessons
What doesn’t
- Snug fit is tight on a bigger seven- or eight-year-old
- No long-hair version in this size
Who it’s for
A preschooler or early primary child whose junior cap keeps sliding off.
Bottom line
Buy this when the standard junior cap is too big. Sizing is the whole problem with kids' caps.
Speedo Lycra Swim Cap
The most comfortable cap you can buy and the least waterproof — a hair-keeper, not a water-blocker.
Specifications
- Material
- Lycra / polyester blend
- Fit
- Soft, stretchy
- Water resistance
- Minimal
- Hair length
- Any, including long
What works
- No pulling, no snagging, no pressure — it feels like a fabric hat
- Fits long hair without a specialist shape
- Comfortable for an hour or more in open water
- Sun protection for the scalp on a bright lake day
What doesn’t
- Does not keep hair meaningfully dry — water passes straight through
- Fabric stretches out over a season and stops gripping
Who it’s for
Someone who wants hair kept out of their face and off their goggle strap, and does not care about dryness.
Bottom line
The right cap if the goal is comfort or keeping hair contained. The wrong cap if the goal is dry hair.
TYR Long Hair Wrinkle-Free Silicone Cap
An asymmetric cap with extra volume at the back, which is the only design that takes a bun without squeezing.
Specifications
- Material
- Silicone
- Shape
- Asymmetric, extra rear volume
- Hair length
- Long, braided, locs
- Finish
- Wrinkle-free
What works
- The extra rear volume is real, not marketing — a ponytail or bun goes in without dragging hair forward
- Silicone does not catch and tear hair the way latex does
- Wrinkle-free molding means fewer creases to leak at
- Holds its shape across a season rather than going slack
What doesn’t
- The asymmetric shape is easy to put on backwards, which undoes the whole point
- Warmer than lycra, which is noticeable in a heated pool
Who it’s for
Anyone with hair past the shoulders, braids, locs, or volume that a standard cap crushes.
Bottom line
The long-hair default. If a standard cap has ever given you a headache, this is the fix.
Speedo Silicone Long Hair Cap
Extra interior room in a conventional shape — less specialized than the TYR, and easier to get on right.
Specifications
- Material
- Silicone
- Shape
- Domed, extra interior volume
- Hair length
- Long
- Fit
- One size, adult
What works
- Symmetric shape, so there is no wrong way round
- Enough room for a low ponytail without the rear bubble the TYR has
- Thick enough to last a season of chlorine
- Cheaper and more widely stocked than specialist long-hair caps
What doesn’t
- Not enough volume for a high bun, thick braids or locs
- Domed crown can slide back on a small head
Who it’s for
A swimmer with long but not voluminous hair who swims regularly and wants one cap that just works.
Bottom line
The sensible middle option. Only step up to the TYR or a SOUL CAP if this one visibly squeezes.
What to look for in a kids' swim cap
Silicone, sized for the age. That is nearly the whole specification. Silicone slides rather than catches, survives chlorine, and tolerates being stuffed in a wet bag. Sized for the age means it actually stays put.
A smooth interior. Some cheap silicone caps have a slightly tacky inner surface that grabs hair on the way off. You can feel it with a finger before you buy, and it is the difference between a cap a child accepts and one they fight.
Volume, if the child has long hair. The junior sizing question and the long-hair question are separate, and a standard junior cap crushes long hair exactly the way a standard adult cap does. A long-hair cap in a junior size, or a lycra cap, is the answer.
A bright color, if you swim in open water. A cap is the most visible thing on a swimmer's head from a distance, and a bright one makes a child easy to keep track of from a dock or a boat. It costs nothing and it is genuinely useful.
Sizing table
| Head circumference | Typical age | Cap category |
|---|---|---|
| Under 19 in / 48 cm | 3-6 | Small kids' silicone |
| 19-21 in / 48-53 cm | 6-12 | Junior silicone |
| 21-23 in / 53-58 cm | 12+ and most adults | Adult standard |
| Over 23 in / 58 cm, or high hair volume | Any | Large / extra large |
How much should you spend?
Very little, and buy two. A silicone junior cap is cheap, and having a dry one means a child is never putting on a cold damp cap — which sounds trivial and is one of the more common reasons a child stops wanting to swim.
The only place to spend more is long hair, where a proper volume cap is a different product rather than a nicer one. Everything else in this category is inexpensive, and paying more buys you color options.
Will it last a second summer?
Silicone survives chlorine for two or three seasons, so the limiting factor is the head growing, and a junior cap has more stretch tolerance than a junior goggle frame. Most families get two seasons.
Teach the removal technique early: fingers flat, push from the front edge back, never hook it off with nails. Nails are what tear a silicone cap, and a child doing it themselves will tear one within weeks unless shown. Then rinse it, dry it inside out, and keep it out of the bottom of the bag.
Questions
Frequently asked questions
What size swim cap for a 10 year old?
Do kids need a swim cap for lessons?
Silicone or latex swim cap for a child?
How do I get a swim cap on a child who hates it?
Read next